Photos and Facebook post by Tactical Rifle Shooters
Yet another .300 Blackout disaster. Unfortunately, that .300 Blackout cartridge can fit in a .223 Rem chamber. Shooting a .308-caliber bullet in .223 bore is a recipe for disaster.
The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!
This images were provided by Tactical Rifle Shooters on Facebook. The message was clear: “Don’t try to run 300 Blackout in your .223/5.56mm. It won’t end well. The problem is identical rifles and identical magazines but different calibers.”
Image from Accurate Shooter Forum. Cutaway shows the jammed .30-Cal bullet:
For those who MUST have a .300 Blackout, here are some things you can do:
1. Use different colored magazines for .300 Blackout vs. .223 Rem.
2. Fit all your uppers with caliber-labeled ejection port covers.
3. Mark .223 Rem upper handguards with the caliber in bright paint.
4. Mark all .300 BLK Rounds with heavy black marker.
Comments by Folks Who Viewed these .300 Blackout Disaster Photos:
“The .300 Blackout is simply a badly-designed round. A properly-designed round would have had a feature in the shape that would have prevented cross loading in the first place.” — D. Santiago
“I almost made that mistake… I had a magazine of 300 BLK inserted in my .223/5.56 all night. Fortunately, I never pulled the trigger. Once I realized the mistake, I almost got ill. [After that incident] I no longer own a 300 BLK.” — B. Welch
“Happened to me hog hunting from a helo. Gun exploded in my face.” — B. Hood
“Fire-forming projectiles [is] so wrong in centerfire!” — M. Stres
“Had some dude come into the store the other day wanting .300 Blackout ammo to shoot in his 5.56 AR. It took 15 minutes of explaining for him to understand you got to have a .300 Blackout Upper!” — R. Williams
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If you want to use an AR-platform rifle in the varmint fields, consider getting a 20-caliber barrel chambered for the efficient, low-recoil 20 Practical cartridge. The 20 Practical is simply a .223 Remington necked down to 20 caliber. The parent .223 Rem cartridge of course works great in an AR, but the 20 Practical offers some notable advantages for high-volume varmint shooters. The 20 Practical delivers very high velocity with very low recoil while still providing outstanding accuracy. The 20 Practical is great option for folks who favor “fast and light” — smaller, lower-mass bullets traveling at very high velocities. This little cartridge can launch 40-grainers at over 3900 fps, and 32-grainers even faster. This makes the 20 Practical a great choice for an AR-based varmint rifle.
20 Practical Ultimate Varminter
A decade ago, as a “proof-of-concept”, AccurateShooter.com created a 20 Practical AR15 Ultimate Varminter with a custom 20-caliber upper from Robert Whitley of AR-X Enterprises, LLC. That project rifle was ultra-accurate — every 5-shot group out of the gun was less than the size of a dime. That gun was auctioned off, but Robert Whitley continues to produce custom 20 Practical AR15 uppers. (The 20 Practical cartridge is simply the .223 Rem necked down to 20 caliber — you can use standard .223 brass and load with standard.223 Rem dies. Just swap in a smaller expander and use smaller neck bushings.)
Robert learned that the accuracy of the first 20 Practical AR15 was no fluke. After building six (6) more 20 Practical uppers, he tested them for accuracy and they all shot great. These uppers feature DPMS low-pro receivers with side-charging handles. They are fitted with PacNor 1:11″ twist, 3-groove stainless barrels.
Robert reports: “We have been making more 20 Practical AR15 uppers and I have to say I am astounded by the accuracy of these things. For shooting little tiny groups out of an AR15 with bullets going 3500+ fps, it’s hard to beat the 20 Practical. Today I test-fired six more uppers, all with 11-twist barrels. Three of the uppers had 24″ barrels, two had 20″ barrels, and one had an 18″ barrel (we call it ‘Stubby’).
In four of these uppers I shot re-sized Winchester brass using 25.3 grains of WC844 powder with Berger 40gr BTHP bullets loaded at 2.225″ OAL (about .015″ off the lands). WC844 is inexpensive military surplus powder that is nearly identical to H335. I tried three different primers and the choice did not seem to matter (CCI BR4, Rem 7 1/2s and Win Small Rifle — the old silver ones). All these four uppers shot great.”
Below is an animated GIF with targets from uppers #6, 10, and 11. All groups are mag-fed, 5-shot groups shot at 100 yards using a front rest and rear bag.
Targets Shot with Three Different 20 Practical AR Uppers
For more INFO visit www.6mmAR.com, or email: rcw3 [at] erols.com.
20 Practical Shooters Explain Why They Love this Little Cartridge
A current thread in our Shooters’ Forum focuses on favorite variants of the .223 Rem cartridge. The thread asks: “What is your favorite and most versatile round that you have made from a .223 Rem parent case?” Many cartridges were named, but the wildcat cartridge cited most often was the 20 Practical. Here are some comments by Forum members, who explain the appeal of this great little 20-caliber cartridge:
“The 20 Practical is just a hoot to shoot. Outstanding precision, minimal recoil, easy case forming and inexpensive to shoot. What’s not to like? It’s a great way to introduce kids to centerfire, too.” — JLT
“The 20 Practical for me. Never had as much fun shooting a rifle as I did with the 20 Practical. Also, [it is] the easiest wildcat to form. Just get cases, a couple of bushings to get the right neck tension, and you are shooting.” — NMKid
“Favorite .223 Rem Wildcat? The 20 Practical hands down for me. I have two of them built on Savage actions right now. One has a 20″ BHW barrel and the other has a 26″ Criterion. It is my go-to caliber for shooting up a Prairie Dog town and the ones I have are insanely accurate. Here are some typical 100- and 200-yard groups with my 20 Practicals.” — IA_Shooter
“My favorite was and is the 20 Practical. No fire-forming, no neck-turning, and with the increased BC of the 20 Cal bullets, it’s hard to wipe the smile off your face in a prairie dog town[.]” — Region Rat
“20 Practical and the [original] .223 Rem are my favorites. Accurate, cheap to shoot. The 20 Prac allows you to see your hits and it’s fast.” — Alguapo
“20 Tactical or 20 Practical. Both very easy to reload and/or form from .223 brass. And they are accurate, reach out on varmints at surprising ranges.” — Bill K
Smart Tips on Forming 20 Practical Cases
Varmint ace Warren B, aka “Fireball” in our Forum, explains how to form 20 Practical Cases. “Forming 20 Practical cases is very easy and no fire-forming is required. Start with any good quality .223 Rem brass. One can simply run the case into your bushing die with the appropriate bushing and call it done. I however like to make it a little more involved by doing the neck reduction in steps. I find that taking steps doesn’t overwork the brass as much as one step does. Also, if you resize the neck in too large of a step, sometimes, depending on the neck thickness, the neck will not be dimensionally what you would expect when finished. This is especially important towards the last step when one is getting close to the final required neck diameter.
For my cases the first thing I did was to run them into an old RCBS .223 Rem full length die with the decapping assembly removed. This will take care of any dented necks on the raw cases and bring the necks down to around 0.243″. Since all standard full-length dies oversize the necks way too much, starting with a .223 FL die actually reduces the neck diameter quite a bit–and obviates the need to buy an extra bushing for the first step. I then use my Redding Type-S die with two bushing sizes to get down to where I need to be. In other words, I start with the FL sizer, then move to a Type-S with a 0.233″ bushing and finish with a 0.228″ bushing. Notice how, as I get to the final step, I use progressively smaller increments in size between the reductions.” (Note: Depending on your brass your final bushing size may be different.)
20 Practical vs. 20 Tactical
Varminter Kevin Weaver, who shoots both the 20 Practical and 20 Tactical, states that: “Both the 20 Tactical and the 20 Practical are fine .20 caliber cartridges. However, my favorite would be the 20 Practical. The 20 Practical gives the SAME performance as the 20 Tactical without fire-forming, or having to buy expensive forming dies.
So with the 20 Practical you do less work, you shell out a lot less money, yet you give up nothing in performance. What’s not to like? To create 20 Practical cases, just buy a .223 Rem Redding Type “S” Bushing Die set with a .230 or .228 bushing and have fun with this great little cartridge.
The 20 Practical and the 20 Tactical are almost identical cartridges. There are only slight differences in case outside diameter, shoulder angle, and case body length. Neck length on the 20 Tactical is a bit longer, but there is still plenty of neck on the 20 Practical to grip the popular bullets, such as the 32gr V-Max.”
20 Practical and 20 Tactical Specifications:
Cartridge
Bolt face to shoulder
Shoulder O.D.
Shoulder Angle
Total length
20 Practical
1.5778″
.3553
23°
1.760″
20 Tactical
1.5232″
.360
30°
1.755″
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This week’s featured firearm belongs to John “SnakeEye” Seibel, founder of the VarmintsForFun website. In recent years, John has become a “true believer” in the little 20-Caliber cartridges. He says this light-recoiling 20 PPC, Rampro-actioned pistol is perfect for a quick shot on a critter, taken from the front seat of his truck. John tells us: “A long-range pistol is an ideal truck gun in my opinion. It stows in a small area and doesn’t take up the room a rifle does. Just keep ear protection near by at all times! I’ve taken varmints as far as 400+ yards with this 20 PPC pistol, so why would you need a rifle?”
Perspectives on Pistols for the Varmint Hunter
by John Seibel
I decided to try my hand at shooting varmints with a pistol one day when I grew tired of wrestling a rifle around in the truck for a quick shot. Many times when traveling around on the farm you’ll spy a groundhog or fox that usually isn’t more than 200 yards away. A single-shot pistol like the Thompson Contender could fit the bill. With its compact length, around 20 inches, a long-barrel pistol can lay on the truck’s passenger seat for easy access. I usually keep my two leather brick-style sandbags laying beside the console and seat. I have a box made from hard rubber that I lay across the top of the door. I then lay the two bags on top. This makes a nice platform to rest the pistol’s forearm. I like to use a forearm that is at least two inches wide. That lets the gun lay steady—almost like you are shooting from a bench rest. For the shooting hand, I prefer a pistol grip with finger grooves and a slight overhang or flare for the web of your hand.
As for optics, I tried long-eye-relief pistol scopes but they lacked the magnification you need for long-range target shooting or varminting. Those pistol scopes have really long eye-relief because they are designed to work with the pistol held at arm’s length. When shooting at the bench or from a truck that’s not what you want. By the time you find the target and get your eye in the exact location, the varmint has moved on or died of old age! After much fiddling around with pistol-type scopes, I finally decided to use rifle scopes on my long-range pistols. The minimum I use is a 4.5-14×40. Eye relief on a Leupold 4.5-14x40mm is about 3.5 inches at 4.5 power. Field of view is better with rifle scopes too and it’s easier to acquire your target. For this type of shooting a light-recoiling caliber is essential or you will have scope-eye bad! I currently have three long-range pistols and use them to shoot 17M4, 20 PPC, 22 BR, and .223 Rem. The featured gun may be the most accurate of my pistols, and your editor thinks it’s the most handsome of the three.
The Rampro Pistol Project — Working with John Illum
A couple of years ago I called John Illum of Rampro about building the ultimate long-range pistol. It just so happens that John was a big time long-range pistol shooter. I told him that I wanted a gun that didn’t recoil badly and wouldn’t torque when fired. As I am a quadriplegic, with no grip in my hands, the gun had to handle well under recoil so I didn’t drop it. Recoil had to be straight back–no twisting.
Well Illum listened to me and came up with a gun that performs just the way I wanted. Illum suggested a rear grip stock of his own design. It has a 2.25″ wide forearm and a rear grip with a slight palm swell that fits your hand perfectly. Another nice feature is the finger grips. It has an extended overhang or “beavertail” that fits comfortably in the web of your hand. Of course it had to be walnut! I chose Rampro’s STP small action with a PPC bolt. His bolt uses a Sako-type extractor. The action is a single-shot. Being right-handed, I chose a right bolt, left port configuration. This works really well in a pistol. You can load with your left hand and see the round laying in the action–that’s what you want in a pistol without a safety.
Gun Specifications John Illum’s Rampro actions are chrome-moly steel. Commonly you’d see them blued, but I had him put a brushed nickel finish on the action and rings. From a few feet away it looks like stainless. The trigger is Illum’s own design set at 8 ounces, and there’s no creep that I can detect. The action has Remington barrel threads and will accept Remington type triggers. One neat thing is that the action was milled with an integral recoil lug (much like the current Surgeon Action). And the bolt is milled all in one piece–no soldered-on handles. My only gripe with this bolt handle is that it could be a tad longer, but it still is manageable for a single-shot. You’ll also note how slick and streamlined the scope rings are. Illum made those as well. His rings mount to the action via two screws from the inside of the ring, a very elegant set-up for sure. (I currently have a 6.5-20x40mm Nikon scope on this gun. If I had to do this project over again the only thing I would change would be installing a 30mm scope because I like ‘em!).
The barrel is a PacNor Super-Match heavy taper with flutes milled by John Illum, who did all the gunsmithing on this pistol. Twist rate is 1 in 12 inches, with an 11° crown, polished to a mirror finish. The barrel was bead-blasted on the exterior to cut glare. I had Illum cut a 20 PPC minimum-spec chamber, with a .237″ neck. That way I don’t have to turn necks on the Lapua Brass (220 Russian necked down to .204). This is a varmint gun–there’s no need for turned necks. [Editor’s Note: Rampro is no longer in business. However, John tells us “I haven’t had any problems with the action so far. If I did, most competent gunsmiths could fix them easily.”]
Handgun Handling Tips
If you want to shoot a long-range pistol but have never have shot this kind of gun before, try to find a mentor — someone with a gun like this who can school you a bit in the correct technique. The first thing you notice is that you have no comb or cheek piece to help align your head and neck. And getting used to the optics takes some practice. Most people fit a pistol-type (long eye-relief) scope, but these can be awkward to use, and somewhat frustrating at first — the field of view is very restricted. Move your head very slightly and you can lose the sight picture completely. You can solve that problem by using a standard rifle scope, but that will put your head very close to the eye-piece — just three to four inches. With that arrangement, if you don’t hold the gun correctly … POW instant scope-eye!
Now once you get the hang of shooting a long-range pistol you will find it can be just as accurate as a rifle. But there is a trick to shooting them. Shooting a long-range pistol is a whole new world — you need to hold it just right. If you don’t let the gun roll back a little (i.e. if you grip too hard) you will get vertical stringing. I hold my hand against the back of the grip to guide the gun but let it almost free recoil. Looking at how compact the pistol is, you might think “Hey, this would make an ideal ‘walking-around’ varminter.” Well, that’s not really the case. For real precision shooting a solid benchrest type set-up is a must. You can attach a bipod to a long-range pistol, but you would need a flat surface. A fence-post top would work pretty well without a bipod if you carry a small light bag. Overall though, this type of pistol works best as a sandbag gun. For a walking-around gun, you’d be happier with a rifle I think.
Load Development and Accuracy
When I built this gun, Hornady had just released the 32gr V-Max (see footnote), a good match for my barrel’s 1:12″ twist. I choose the 20 PPC because of the very good Lapua brass (220 Russian parent case). I figured teaming Lapua brass with the little .204 bullet would offer excellent accuracy combined with very low recoil. My expectations were fulfilled. The brass proved to be excellent and the PacNor loved the little V-Max pills.
I tried quite a few different loads and most powders that I tried worked very well. These included: H322, Benchmark, AA 2460, and Reloader 7. Amazingly, with just 14″ of barrel, all of these powders delivered impressive velocities–ranging from 3914 to 4074 fps. I settled on 48 Harrell’s clicks of Accurate Arms (AA) 2460, which drives the 32gr V-Maxs to 3995 fps.
With AA 2460 the gun will shoot in the low 3s at 100 yards consistently — as long as I steer the gun right, which takes some practice. I think groups in the low 0.3″ range is excellent for a non-benchrest factory bullet. Despite having no buttstock to grab, recoil on my 20 PPC pistol is very minimal — it just rocks back into your hand. The main problem is to keep the scope from smacking you, since I used a rifle scope with short eye-relief. Muzzle flash and noise are tolerable but DO NOT shoot one of these without good ear protection. Your ears are very close to the muzzle.
I also have a 20 PPC rifle built on a BAT action with a Richard’s #008 laminated stock cut down in size. That gun’s 1:9″-twist Lilja barrel lets me shoot the Berger 50gr LTB bullets. In the wind, these perform quite a bit better than the 32s. My two favorite loads for the 50 grainers are: a) 26.0gr VV N135, CCI 450 primers, 3615 fps; and b) 27.3gr Hodgdon Varget, CCI 450s, 3595 fps. The BAT 20 PPC also shoots really well with the 40gr V-Max, pushed by N135 and Fed 205M primers.
Pistol Action Legal Issues
One important thing to remember if you build a pistol is to make sure the receiver came from the factory as a pistol and was titled as a pistol. Rifle actions are illegal to use as a pistol. Yes, that’s a nonsensical law, but it’s still on the books. You can use factory pistol actions such as the XP 100.
If you want a new custom action such as a BAT (my favorite), you can order it as a pistol action and when you get it, register it as a pistol. Note, in some states there may be additional fees, waiting periods, or restrictions for pistol actions (as opposed to rifle actions). Check your local laws before ordering the action.
Future Trends in Varmint Hunting — Plenty of Twenties
I think these sub-caliber rounds, both 20s and the 17s, are the future of recreational varminting, at least out to medium distances. The Twenties offer low recoil, excellent accuracy, and components keep getting better and better. The bullet-makers are finally making high-quality bullets in appropriate weights. Compared to something like a 22-250, I’ve noticed that my 20 PPC rifle has a lot less noise, a plus when you want to be quiet around other people and varmints.
The flat trajectory is another big advantage in the field. With the 20 PPC, zeroed at 100 yards, I can pretty much hold dead center and get hits out to 300 yards or so without touching the scope to add elevation. [Editor: The same is true with the 20 Practical cartridge, basically a .223 Rem necked down to .20 Caliber. It has proven very accurate and easy to tune.]
The 20-Caliber cartridges we have now, in particular the 20 PPC and 20 BR, are very well-refined. You don’t have to do a lot of tuning or tinkering to have a very accurate, effective varmint-slayer. In fact, if I could dream up a signature “20 VFF” (Varmints For Fun) cartridge it would basically be the 20 PPC. In truth, nearly any of the popular 17- or 20-Caliber cartridges will perform well if you start with top-quality brass. The sub-calibers have less recoil and burn less powder, and there are very good components for most varmint and target-shooting applications. To me it seems that these small calibers work so well because of good components, low recoil, and efficient cartridge designs (particularly in the VarTarg and PPC cases).
WARNING: For your own safety, ALWAYS reduce all starting charges by 10% and work up carefully! Ambient temperature changes, powder lot variations, and differences in barrel friction can result in significantly increased pressures.
20 PPC LOAD MAP
Bullet GR
Maker
Powder
Charge
Primer
Case
Velocity fps
Barrel Twist
Comments
32
Hornady V-Max
H322
27.6
Rem 7½
Lapua
4000
Lilja 1:12
WarrenB Form Load
32
Hornady V-Max
AA 2460
29.5
Rem 7½
Lapua
3995
PacNor 1:12
SnakeEye Pistol Load
32
Hornady V-Max
H4198
25.1
CCI BR4
Lapua
4222
PacNor 1:12
A. Boyechko Load
39
Sierra BlitzKing
H322
26.0
Rem 7½
Lapua
3700
Lilja 1:12
WarrenB Load
39
Sierra BlitzKing
VV N540
28.8
CCI BR4
SAKO
4064
PacNor 1:12
D.Moore, Low 2s
40
Hornady V-Max
VV N135
27.8
Fed 205m
Lapua
3950
Lilja 1:9
SnakeEye Load
50
Berger LTB
VV N135
26.0
CCI 450
Lapua
3615
Lilja 1:9
SnakeEye Load
50
Berger LTB
Varget
27.3
CCI 450
Lapua
3595
Lilja 1:9
SnakeEye Load
Footnote: When first manufactured, the small Hornady 20-Caliber V-Max bullet was actually 33 grains, not 32 grains as sold currently. I still have some of the 33-grainers. I’ve observed no functional difference between the 33s and the current 32-grainers.
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Here is one of Bill Reid’s 6mmBR (6BR) rigs. Like his Sako 6 PPC, this is exceptionally accurate.
AccurateShooter Forum member Bill White (aka “CT10Ring”) is a New Yorker who relocated to Idaho in his senior years. From his Idaho home, Bill enjoys long-range target shooting. But his favorite gun pastime is varmint hunting in nearby states — the Dakotas, Montana, and Wyoming. Every year he loads up his truck and hits the road, often doing a grand circle route, visiting prairie dog havens in multiple states.
Bill has a large rifle collection, most of which see duty in the varmint fields of Montana, North Dakota, South Dakota, and Wyoming. Here are his key “take-aways” for his eight favorite varmint chamberings: .204 Ruger, .223 Rem, .22-250, .22 BR, .22-243, 6 PPC, 6mmBR, and 6-6.5×47 Lapua (aka 6×47).
Eight Great Varmint Cartridge Types — .204, .224, .243 Calibers
.204 Ruger — This delivers great velocity with the little .20-caliber bullets, with mild recoil. The .204 Ruger easily reaches out to 400 yards, but heavier winds do move the tiny bullet around. Tremendous splat factor under 250 yards. I use Sierra 39gr bullets with IMR 8208 XBR in a Sako 75. Even now, .204 Ruger ammo is relatively easy to find.
.223 Remington — Probably the most popular centerfire rifle round in the USA, the .223 Rem offers inexpensive brass, and is a great choice for AR-15 owners. If you run short on ammo, you can find it nearly everywhere. I often bring one AR-15 and one .223 Rem bolt gun on varmint safaris. My Rem 700 5R 1:9″-twist barrel likes 53gr V-Max bullets.
.22 BR — My .22 BR is my first choice for most prairie dog missions. Accuracy is superb with necked-down 6mmBR Lapua brass — quarter-MOA and blazing fast. With the right twist rate, this chambering can shoot anything from 40gr FB bullets to 80gr VLDs. Load development is easy. Below is my .22 BR ammo for another varmint trip. I use 55gr Sierra BlitzKings with Varget in my 1:12″-twist Shilen-barreled rifle. 60gr Bergers are very accurate with a fairly flat trajectory for useful distances.
.22-250 Rem — A classic varmint cartridge, the .22-250 with 50gr V-Maxs delivers spectacular hits. If three P-Dogs happen to be lined up, I’ve witnessed one .22-250 shot take ‘em all out with a triple hit. I currently have five .22-250-chambered rifles: 3 Sako 75s, one Rem 700, and a single shot Nesika that shoots tiny groups. I favor the very deadly Berger 52gr Varmint HP. Making a custom .22-250? With a 1:8″-twist barrel you can use the full weight range of .22-cal bullets, while spinning the lighter bullets fast for “red mist” effect. Remember this cartridge can be a barrel burner. Don’t shoot too many rounds too quickly.
.22-243 Win — This wildcat is even more potent than the .22-250, delivering devastating results on P-Dogs. Run a .243 Win case slowly through a full-length .22-243 die, with plenty of lube to form the brass. I start with Lapua .243 Win brass. There can be some issues necking-down the brass. Watch for donuts forming at the neck-shoulder junction. I bought my .22-243 rifle not sure how it would perform. But now I love shooting it. My .22-243 delivers half-MOA groups with 41.0 grains RL-22 and Hornady 75gr Amax bullets. With those 75-grainers, it’s great in the wind and good to 600 yards easily.
6 PPC — You may consider the 6 PPC a benchrest competition cartridge only, requiring fire-forming. However I have an original Sako 75 single-shot 6 PPC rifle that I load with Sako-headstamp 6 PPC brass (see below) so no fire-forming is required. This Sako 75 came with a test target that measured 0.113″! With my 6 PPC Sako, I found that 58gr V-Maxs, pushed by Vihtavuori N133, are potent out to 300 yards. [Editor’s NOTE: As the Sako brass is no longer available, new 6 PPC shooters will need to fire-form their brass, or try to find Norma 6 PPC brass.]
6mmBR — The 6mmBR Norma (6BR) offers a nearly unbeatable combination of accuracy, efficiency, and tunability. With the 6BR and a fast twist barrel, you can shoot everything from 40gr flat-base bullets to the latest 105-110gr match bullets. I load Lapua brass, Vihtavuori N135, and Hornady 58, 65, and 75gr bullets for my Krieger 1:14″-twist HV barrel. While this cartridge is capable of long-range accuracy, I usually limit my 6BR shots to 350-400 yards.
6-6.5×47 Lapua — I have a nice 6-6.5×47 Lapua varmint rifle, with Surgeon action and Manners stock. I Cerakoted the barreled action and then bedded the action. Shown below is 6-6.5×47 ammo I loaded for testing. Note how I separated different bullets and powder loads into multiple, labeled bags. Hodgdon H4350 is a great choice for this cartridge — 39 grains H4350 with 105gr Amax was the winner here, but 88gr Bergers also shot well. This cartridge has tremendous “critter dismantling” abilities out to 600-700 yards.
Six Tips for Novice Long Range Varmint Hunters
1. Take twice as much ammo you think you may need. The fields could be particularly rich, or, because of wind or other variables, you may have far more misses than expected.
2. When possible, set up with the wind at your back (or, alternatively, directly ahead). This will minimize the effect of cross-winds. Set up a stake with a ribbon to show wind direction.
3. Bring at least two rifles. Ideally one would be a low-recoil rifle with cheaper components for the closer shots. Then bring a rifle with higher-BC bullets for longer shots where wind is a bigger factor.
4. Check the weather before you head out. Prairie dogs like sunshine and calm conditions. If a cloudy, very blustery day is predicted, considering staying in town and cleaning the rifles.
5. Bring plenty of water on a trip. An adult male should be drinking at least 64 ounces of water (or other liquid) every day — more if it’s very hot or you are sweating a lot.
6. Preferably always hunt with a companion. If you do go out solo, have a Garmin inReach SatComm/GPS for emergencies if there is no cell coverage in your location.
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Gavin Gear, founder of the UltimateReloader.com website, has created a very popular YouTube Channel. Over the past 14 years, Gavin has produced hundreds of videos covering nearly every aspect of reloading, rifle assembly, and gunsmithing. When important new reloading products are released, you’ll often find that the very first, in-depth reviews come from Gavin. He seems to get the new stuff before ANYone else.
Gavin’s Ultimate Reloader videos are very professional, with high-quality lighting and audio, multiple camera angles, and careful editing. And unlike many of the YouTube video hosts, Gavin is also a talented shooter and skilled gun-builder. His shop is complete with modern lathes, mills and other tools so he can build his own very accurate rifles from start to finish.
BAT Machine Modular Bolt — Design Features and “How To”
With most rifle actions, if you want to run a variety of cartridges with different case head diameters, you will need multiple bolts. However, there IS an alternative to purchasing multiple pricey bolts. BAT Machine has come up with a great solution for the bolt face issue — the Modular Bolt System. In this video Gavin explains how the Modular Bolt System works. He explains the design, then shows, step-by-step, the entire process for swapping bolt head sizes. With a bit of practice, this can be done easily in a couple minutes. Showing a bolt head swap start to finish (00:50 — 2:15 time mark), Gavin shows how to use the BAT Bolt Disassembly Tool and BAT Sleeve Removal Tool to complete the task quickly and easily.
AMP Inline Press — Effect of Brass Prep and Neck Chamfer
In this video Gavin examines various cartridge brass prep processes, and then used the advanced, computer-controlled AMP press to determine how those processes affect bullet seating forces/consistency. Gavin noted: “Each process is examined and a graph is presented of the bullet seating forces. We anticipated some of what we saw, and were surprised by other things.” The computer-controlled AMP press provides a graph of the exact seating forces, allowing to improve your brass prep to achieve the most consistent seating. Gavin notes: “Lately we’ve been seeing the AMP Press used for tight quality control from precision reloaders around the world.”
In this follow-up video, Gavin employs the advanced AMP press to examine how case neck chamfering affects bullet-seating force and consistency. Gavin tells us: “In this video, we single out one variable: Chamfering Case Mouths.”
Creedmoor Sports TRX-925 Scale Review
This is NOT a magnetic force-restoration scale, but it is one of the best strain-gauge scales you can buy. And, priced at $349.95, the Creedmoor Sports TRX-925 Precision Reloading Scale costs less than half what a good force-restoration scale costs. That’s a big deal for folks on a budget. This TRX-925 scale offers very good performance for the price. We include a second, detailed, 25-minute review by F-Class John who says the TRX-925 offers excellent performance for the price. F-Class John, who has his own popular YouTube Channel, produces very comprehensive, thorough product reviews.
This Second TRX-925 Video is from F-Class John:
Finding Cartridge Length to Lands in your Barrel — Three Methods
In this video, which has over 250,000 views on YouTube, Gavin shows three (3) different methods to determine length to lands (L-to-L). This means you are finding the exact length of a case with bullet when the bullet first contacts the rifling in the barrel. It is important to determine this dimension with repeatable precision, so you can tune your load length for best accuracy. In addition, in some disciplines you’ll want to avoid seating into the lands.
Creedmoor Enhanced Press Head for Redding T-7 Press
The new Creedmoor Enhanced Press Head for the Redding T-7 Turret Press is a direct upgrade that offers many advantages for precision, ease of use, and reloading. Made from solid 416 Stainless Steel, this Press Head boasts precision cut threads, integral detent/track system, and seven threaded handle position. Creedmoor states: “A machined stainless steel head, rather than one made from cast steel, allows for tighter tolerances, an improved surface finish, and ultimately makes a better product for our customers.” The Redding T-7, already a good turret press, functions better with this press head, which is precision-machined to ensure flatness of both upper and lower surfaces. The Enhanced Press Head, which can be installed in a matter of minutes, is available now from Creedmoor Sports for $179.95.
.223 Rem vs. 5.56x45mm — 6.3 Million Views
This video explains essential facts and corrects common misconceptions related to both .223/5.56 ammunition, as well as .223/5.56 rifles. Gavin provides insight on chamber specs, pressure levels, barrel twist rates, military 5.56 crimped brass, and other important topics. If you are new to the AR world, this video is definitely worth watching. And that’s why it now has garnered over 6.3 MILLION YouTube views, making it one of the most popular gun-related videos ever made. Gavin adds: “Don’t forget to check out the full write-up on UltimateReloader.com.” CLICK HERE for FULL STORY.
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Most of us own a .223 Rem rifle. Now, thanks to our friends at Rifleshooter.com we can assess exactly how velocity changes with barrel length for this popular cartridge.
Rifleshooter.com performed an interesting test, cutting the barrel of a .223 Rem rifle from 26″ all the way down to 16.5″. The cuts were made in one-inch intervals with a rotary saw. At each cut length, velocity was measured with a Magnetospeed chronograph. To make the test even more interesting, four different types of .223 Rem/5.56 ammo were chron’d at each barrel length. The Rifleshooter.com team that conducts these tests has a full-service gun shop, 782 Custom Gunworks — visit 782guns.com.
Test Barrel Lost 25.34 FPS Per Inch (.223 Rem Chambering)
How much velocity do you think was lost, on average, for each 1″ reduction in barrel length? The answer may surprise you. The average speed loss of the four types of .223/5.56 ammo, with a 9.5″ shortening of barrel length, was 240.75 fps total (from start to finish). That works out to an average loss of 25.34 fps per inch.
5.56/.223 Barrel Cut-Down Speed Test 26″ to 16.5″
Start FPS at 26″
End FPS at 16.5″
Total Loss
Average Loss Per Inch
UMC .223 55gr
3182*
2968
214
22.5 FPS
Federal M193 55gr
3431
3187
244
25.7 FPS
Win m855 62gr
3280
2992
288
30.3 FPS
Blk Hills .223 68gr
2849
2632
217
22.8 FPS
*There may have been an error. The 25″ velocity was higher at 3221 fps.
Rifleshooter.com observed: “Cutting the barrel from 26″ to 16.5″ resulted in a velocity reduction of 214 ft/sec with the UMC 223 55-grain cartridge, 244 ft/sec with the Federal M-193 cartridge, 288 ft/sec with the Winchester M855 cartridge and 217 ft/sec with the Back Hills 223 68-grain match cartridge.”
How the Test Was Done
The testers described their procedure as follows: “Ballistic data was gathered using a Magnetospeed barrel-mounted ballistic chronograph. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Average velocity and standard deviation were logged for each round. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The barrel was cut off using a cold saw. The test protocol was repeated for the next length. Temperature was 45.7° F.”
See More Barrel Cut-Down Tests on Rifleshooter.com
Rifleshooter.com has performed barrel cut-down tests for many other calibers/chamberings including 6mm Creedmoor, .308 Winchester, and .338 Lapua Magnum. See these test results at Rifleshooter.com.
Much Different Results with 6mmBR and a Longer Barrel
The results from Rifleshooter.com’s .223/5.56 test are quite different than the results we recorded some years ago with a barrel chambered for the 6mmBR cartridge. When we cut our 6mmBR barrel down from 33″ to 28″ we only lost about 8 FPS per inch. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was longer than Rifleshooter.com’s .223 Rem start length. Velocity loss may be more extreme with shorter barrel lengths. And, of course, different cartridge types and powder/bullet combinations will yield different results.
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While many of our readers are caught in the wicked cold-spell hitting the Northeast, take heart — spring is not far away. That means folks will be getting ready for varmint safaris. Here’s a story that may help you choose a cartridge for your next varmint rifle.
For many years, Ken Lunde journeyed to South Dakota to visit with his father, and do a little varmint hunting. This article features Ken’s Cooper Model 21 Montana Varminter chambered in .204 Ruger. During past varminting holidays in South Dakota, Ken had a chance to try the speedy .204 against his “old reliable” .223. He came to favor the .204 for its accuracy, flat trajectory, and superior performance in the wind. Ken told us: “I love my .223, but the .204 has the edge for Dog-Town duty.”
The Cooper Montana Varminter in .204 Ruger
Story and photos by Ken Lunde
I’ve been a big fan of Cooper Arms rifles ever since my dad introduced them to me a few years ago. I prefer Cooper Arms rifles over others because they perform as they should out-of-the-box, and have outstanding workmanship and beauty. You get form and function. You don’t need to choose one over the other. For the price one pays, Cooper Arms rifles are a great bargain. I mount a quality scope, usually a higher-end Leupold with a 40mm objective, go through barrel break-in, and they always perform extraordinarily well. I should state that all of my rifle shooting is geared towards hunting. In other words, any shooting I do on paper is treated as preparation for using the same rifle for hunting, whether it’s for varmints such as prairie dogs, or for larger game.
Cooper Varmint Rifles–Components and Variations
The featured rifle is a Cooper Arms M21 Montana Varminter (aka “MTV”) chambered in .204 Ruger. It has a 24″ varmint-taper stainless steel barrel with a 1 in 12-inch twist. This twist rate seems to be typical of .204 Ruger barrels from other manufacturers. The stock is AA+ grade Claro Walnut, and has the varmint fore-end, “Buick” vents, and steel grip cap that are standard on the Montana Varminter configuration. Among Cooper’s three wood-stocked varmint rifle configurations — Varminter, Montana Varminter, and Varmint Extreme — I prefer the Montana Varminter as it seems to be the best balance of value versus features. Plus, I like the “Buick” vents. They’re very pleasing, at least to my eyes. Maybe that’s why I own seven of them, in M21 and M22 actions, and in a variety of calibers. [Editor: Ken’s father has a near-identical .204 Ruger Cooper, with consecutive serial number.]
For this rifle, I decided to mount a Leupold VX-III 6.5-20×40 LR scope with the Varmint Hunter reticle. The rifle came with Leupold STD bases in Matte finish, and I used Leupold 30mm STD rings in Medium height and Matte finish. I took the time to align the bottom rings on the bases, and properly lapped them. Other than mounting the scope, no custom work was done, because none was necessary. The trigger is superb out-of-the-box, which is typical of Cooper rifles.
Load Development and Accuracy I first tried factory ammo, loaded with Hornady 32gr and 40gr V-Max. The 32gr load shot the best — five-shot groups were slightly larger than a half-inch at 100 yards. My dad heard that Alliant Reloder 10X was a good powder for this cartridge, and he worked up a load using the Sierra 32gr BlitzKing bullet. He found that 26.5 grains was the right amount for his rifle. Considering that my rifle was probably made on the same day, having a consecutive serial number, I decided to try my Dad’s load, along with a half-grain up and down: 26, 26.5, and 27 grains of powder. I, too, found that my rifle prefers 26.5 grains of RL 10X. With this load, I could shoot consistent quarter-inch, five-shot groups at 100 yards. Cartridge OAL is 2.353″, or 1.990″ measured from the ogive.
I am using Winchester brass, Federal 205M primers, Alliant Reloder 10X powder, and Sierra 32gr BlitzKing bullets. I use Forster dies, and load with a Forster Co-Axial single-stage press. Here are two typical targets. As you can see, this .204 can shoot.
WARNING: Current lots of Reloder 10X powder may be somewhat different. 26.5 grains of RL 10X may be TOO HOT for your rifle and 32gr bullets. Seating depth, throat length, and COAL will affect pressures dramatically. START LOW at 24.5 grains and work up.
Cartridge Smack-Down — .204 Ruger vs. .223 Remington
Ken made these comments when he first tested his .204 Ruger vs. his trusty (and very accurate) .223 Remington: “I brought along two rifles. The first was my ‘proven’ varmint rifle, the one chambered in .223 Rem. It has stunning wood, and clearly escaped the factory with AAA grade Claro Walnut. That rifle also shoots consistent five-shot, quarter-inch groups at 100 yards. For the .223, my preferred load uses Winchester brass, Federal 205M primers, Hornady 40gr V-Max bullets (non-moly), and 26.2gr of Vihtavuori N133 powder.
I found that I very much enjoyed shooting the .204 Ruger rifle, which explains why I used only the .204 Ruger during the second trip, although I also brought along the .223. Why did I favor the .204? Well, those little 32gr bullets really zing out of the barrel, with a very flat trajectory, like a .22-250. And, to my surprise, they buck the wind very well, perhaps even better than .223. While I am no ballistics expert, I think that this may be due to its high velocity, clearly over 4,000 fps.
Related to the flat-shooting characteristics of the .204 Ruger cartridge, I found that I was able to depend on my Leupold’s Varmint Hunter reticle for both bullet drop and wind compensation. It was a very pleasing experience. For determining ranges in the field, I used a new set of optics for this trip, Leica’s new Geovid 8×42 BRF range finder.
Comparative Ballistics: .204 Ruger vs. .223 Remington vs. 22-250
Cartridge
Bullet
BC
Powder
Max Load
Muzzle Vel
400yd Drop
400yd 10mph Wind
.204 Ruger
32gr V-Max
.210
Benchmark
28.0
4047 fps
25.50″
17.88″
.204 Ruger
40gr V-Max
.275
H4895
27.7
3741 fps
26.93″
14.10″
.223 Rem
40gr Nosler BT
.221
Benchmark
27.3
3666 fps
30.67″
19.02″
.223 Rem
50gr Nosler BT
.238
BL-C(2)
28.0
3428 fps
34.21″
19.01″
22-250
40gr Nosler BT
.221
H4895
37.0
4060 fps
24.73″
16.67″
Load data from Hodgdon.com, for 24″ barrel. 2.250″ COAL .204s, Fed 205s. 2.210″ COAL for .223 Rem, Winch SR. 2.350″ COAL for 22-250, Winch LR. Always start 10% low and work up. Calculated at 1000′ altitude, 80° F.
This 2022 third-party video records the performance of .204 Ruger Hornady factory ammunition with both 32gr and 40gr V-Max bullets.
Dakota Dog-Town Adventures with Dad
Editor: When this story was originally written, Ken Lunde made two summer trips to South Dakota to hunt prairie dogs with his father. Here is his account of those summer-time adventures.
I drove to South Dakota twice [that year]. For the first trip, I brought two Coopers, both M21 MTVs, in .223 and .204 Ruger. My .223 Cooper was already proven during previous trips to South Dakota. I fired a total of 300 rounds, 200 from the .204 Ruger and 100 from the .223. I found the .204 Ruger to be flatter-shooting than .223, and it also seemed to buck the wind better, even with the light 32gr bullets.
For the second trip, I ended up shooting 301 rounds, all from the .204 Ruger rifle. I had discovered the importance of accuracy when hunting prairie dogs — and the .204 Ruger had exceptional accuracy. There are many variables with which to contend while shooting: wind speed, wind direction, variable distance to target, bullet drop, steadiness, and the accuracy of the load in the rifle. I find that the more of these variables I can control or compensate for, the greater the success.
I estimate I bagged about 250 prairie dogs during each trip, meaning about 500 in total for this season. There were misses, of course, but those are generally 400 yards and beyond, when wind becomes too much of a factor, or shooter error. And, for each trip, I managed to get two or three “doubles,” which is lingo that means that a single bullet results in two dead prairie dogs. Prairie dogs tend to congregate, and when they do, “doubles” become possible, and “triples” are not out of the question. One of these “doubles” was clearly visible through my scope.
The best part of these trips is spending quality time with my dad, doing something that both of enjoy: shooting and hunting. I grew up in Wisconsin, and my parents moved to South Dakota in December of 2004. South Dakota, and sometimes Wyoming, have come to be our preferred hunting states, because they’re superb hunting destinations. It is great that my parents have decided to settle in one of those states. In fact, the drive from California is not bad. It takes a little over one day. I also brought my teenage son along. He enjoyed the chance to go fishin’ with Grand-Dad, and one day “teen-angler” managed to catch us six fine trout.
My first trip to South Dakota, at the end of June, offered a unique oppor-tunity, since First Stop Guns was having a show that coincided with my time in the area. Dan Cooper, founder and owner of Cooper Arms, was present at the show. My dad and I decided to host a small dinner at my parents’ new home, and we invited Dan Cooper and others. I brought tenderloin steaks from California for this. In addition to Dan Cooper, Mark and Steve Blote of First Stop Guns, along with Paulette Kok of Dakota Arms, attended the dinner. It was a pleasure and honor to be in their company. They’re all very personable.
My father has a rather vast collection of Cooper Arms rifles, so I naturally invited Dan Cooper to check them out. A couple of them turned out to be special. One turned out to be the very first .22-250 rifle that Cooper Arms built. It is a Model 22 Varmint Extreme with ebony fore-end tip. Another is an Model 21 Classic with Schnabel fore-end, and according to Dan, less than 30 such rifles were ever crafted. It’s in the rack picture at left. Two of Dad’s rimfires are also very early Coopers, with two-digit serial numbers. They were made before Cooper started using the magazine insert supplied by Anschütz. And check out the middle rifle in the rack. It’s a Dakota Arms Model 97 Deluxe Hunter that I bought for Dad. He hand-picked the amazing wood blank, and it turned into an outstanding rifle stock. You can see how it stands out in the photo. Interestingly, the day before our dinner, I used Dad’s M21 with the Schnabel stock, chambered in .222, to hunt prairie dogs in the 9,000 acres of public hunting land bordering the eastern side of my Dad’s 56-acre “recreational” property, situated just north of Hot Springs, SD. Here’s a photo. Yes, I’d say this is a great place to hunt and “get away from it all”.
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With ammunition in short supply these days, we know ammo production is on people’s minds. Top industry leaders have said the USA will face ammo shortages well into 2021. So ammo-makers big and small are ramping up production to meet demand. If you’re curious how ammunition is created on the assembly by a relatively small, speciality manufacturer, watch the video below to see the entire process, start to finish.
This video from Fog Ammunition reveals how .223 Rem ammo is made. Starting with boxes of bullets and bags of cartridge brass, this video shows how components are bulk-sorted, then .223 Rem ammunition is produced on a modern, linear multi-stage loading machine. In assembly-line fashion, cases are primed, powder is added, bullets are placed, final seating depth is set, and then the case is crimped.
If you’ve never seen an automated loader in action you should definitely watch this video. With this kind of machine, a new round is produced every second or so (see video 1:15 to 1:55). The .223 Remington ammunition featured in this video is loaded with Sierra BlitzKing bullets. Fog offers both rifle and pistol ammo loaded with quality components.
Video Shows Automated Loading Process Start to Finish (Worth Watching):
Remember when primers were plentiful and priced affordably?
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The fall Hunting Season is here. Do you plan to use factory ammo in your hunting rifles? Perhaps you buy bulk centerfire ammo for your AR15 or varmint rifle. Then this book can definitely benefit you.
If you ever shoot factory ammo, you should consider getting Ammo & Ballistics 6. This resource lists over 2,600 different loads for 200+ cartridge types from .17 Mach 2 up to .700 Nitro Express, including the most popular centerfire and rimfire cartridges (both rifle and handgun). In this updated-for-2020 Sixth Edition, there are over 3,000 tables covering virtually every caliber and every load for all commercially-loaded hunting ammunition sold in the USA. Tables include velocity, energy, wind drift, bullet drop, and ballistic coefficients up to 1,000 yards.
Ammo & Ballistics 6 helps you select ammo for a hunt — quickly compare the velocity and knock-down power of various commercial ammo. This book can also help you choose a caliber/chambering for your next hunting rig.
Verified Book Purchaser Reviews
“Outstanding reference guide for shooters and ballistic enthusiasts alike. Has data on velocity, energy delivered, Taylor KO index, windage and elevation on numerous loadings for hundreds of [cartridge types]. Each cartridge has all dimensions labeled (i.e rim, case length, neck, etc.), and has an informative description of the cartridges history/relevance.” — S. Step, 2017
“Great heaps of data! This volume has pages and pages of new data for .22LR like the hot Velocitor, and also on the .22 WMR from 30 grains up into the 50s. Most importantly there is lots of range data, drop, windage, kinetic energy, etc. — Terrific reference guide….” — E. Svanoe
Ammo & Ballistics 6 contains data and illustrations on virtually every sporting cartridge sold in the USA. This 2020 Edition covers 200-plus cartridge types from .17 Mach 2 up to .700 Nitro Express.
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Over the past 18 months, popular ammo types, such as .223 Rem and 9mm, have been hard to find at reasonable prices. The high cost of .223 Rem centerfire ammo has driven more folks to shooting .22 LR rimfire ammo, both for fun and practice. This Sunday we look at a smart solution that allows you to shoot .22 LR ammo from your existing .223/5.56 AR-15 platform rifle. This is great because it allows low-cost training with no change in rifle balance, ergonomics, and/or optics.
The CMMG Bravo .22 LR Conversion Kit provides a replacement bolt/bolt carrier along with three 25-round magazines with special .22 LR-fitted followers and ammo slots. This allows you to shoot rimfire ammo from any AR-15 chambered for the .223 Rem (5.56×45). The CMMG Bravo has an integrated extension that fits into your current chamber. The rimfire bullet passes through this extension and then enters the barrel.
The CMMG Bravo conversion Kit comes with blowback-operated .22 LR bolt carrier, rubber protector for bolt carrier tip, and three 25-round polymer magazines. To use, simply replace the rifle’s .223 Rem bolt and carrier with the Bravo .22 LR conversion unit and load up the included magazine(s) with rimfire ammo.
To use the CMMG Kit, simply remove the centerfire bolt/bolt carrier, and replace it with the CMMG silver colored bolt shown above. CMMG states: “For best performance use a round-style hammer as notched hammers can cause function issues.” Testers have stated that high-velocity .22 LR ammo works best, and CMMG notes that “36gr plated-nose bullets have proven to be the best choice for function.” The copper-plated bullets help reduce fouling.
Ultimate Reloader Tests CMMG .22 LR Conversion Kit
Our friend Gavin Gear of UltimateReloader.com recently tested the CMMG .22 LR AR Conversion Kit. He observed that installation was very straight-forward and the CMMG magazines worked well. He and fellow tester Travis Fox shot the unit both slow-fire and rapid-fire successfully.
Gavin and Travis found the CMMG Kit easy to install and fun to use. With an AR that can shoot both .223 Rem and .22 LR, it’s like having “two guns in one”. Travis was impressed with the ease of use: “It is so simple to change over to the CMMG .22 LR AR kit! It took me about 68 seconds the very first time I tried. Each time after that it took me about 40 seconds — it’s that simple. It takes longer to fully load one of the mags than it does to switch over from .223/5.56 to .22 LR and back.”
The AR shot very well with the higher-velocity ammo types. 100% functioning was achieved with both 40gr Federal Game Shok ammo and American Eagle High Velocity 38gr Copper-plated HP ammo. NOTE: CMMG does recommend high-velocity Copper-plated rimfire ammunition.
Maintenance Tip — After converting back to your centerfire .223 Rem (5.56), Travis says “make sure to clean the gas tube and components as .22 LR tends to run dirty”. READ Full Test on UltimateReloader.com.
CMMG Bravo Conversion Kit Gets Thumbs Up from Gavin and Travis
“Does this conversion kit get the Ultimate Reloader stamp of approval? Absolutely! In these times of ammunition/component scarcity this gives options to shooters. Finding bulk .22 LR can sometimes be easier than 223/5.56. This kit gives that option at a great price. Any chance to keep skills up and familiarize new shooters to a platform is a good thing. Basically two rifles for a lot less than another rifle.”
How to Install CMMG Bravo .22 LR Conversion Kit
The Brownells video below shows the installation process step-by-step:
In this instructional video, a Brownells gunsmith demonstrates (step by step) how to install, disassemble, clean, lubricate, and reassemble the CMMG AR-15 .22 LR Conversion Kits. Clear the rifle and make safe before you start the conversion. Separate the upper and lower, remove the standard bolt carrier group. You then install the conversion bolt and connect the upper and lower as normal.
Details of CMMG .22 LR Conversion Kit
“For years I’ve had a CMMG conversion kit. It’s a drop-in system that’s … very reliable and it’s accurate. The [CMMG conversion] has lower recoil [and is] great for training. Even though ammo prices have gone through the roof, .22 LR is still cheaper to shoot than anything else.” — SootchGear
This SootchGear video shows how to install the CMMG Bravo unit. The video also compares the original CMMG .22 LR bolt assembly with the latest integrated CMMG Bravo at 2:00-3:50. The older unit had a brass adapter and separate chamber insert. The host also tests a CMMG-equipped AR with various types of ammo. Watch a rapid-fire sequence starting at 1:48 time-mark.
Field Test with Two ARs — Rapid Fire .22 LR Testing
The video below demonstrates rapid-fire .22 LR performance with two different ARs using CCI Mini-Mag ammo. The CMMG conversion is fast and easy: “In a matter of seconds you go from 5.56 to .22 LR”. Watch rapid-fire at 5:40 with CCI Mini-Mags in red/black rifle. Then the tester shoots a variety of ammo in a .223 Wylde-chambered all-black AR, starting at 9:40. The Mini-Mags worked flawlessly, but there were a couple fail-to-cycle sequences in extreme rapid-fire with cheaper “bulk” ammo. The lesson here is use good quality, high-velocity ammo.
NOTE: This 2018 video shows an earlier CMMG .22 LR conversion bolt that features a brass adapter and separate chamber insert. The current CMMG Kit has unitized bolt without a separate adapter or insert.
Interestingly, the Mini-Mag .22 LR ammo shot fine in the .223 Wylde-chambered AR. However, CMMG cautions: “Since .223 WYLDE is NOT a mil-spec chamber, we cannot guarantee fit or function with our 22LR conversion kits.”
Reviews from CMMG Bravo .22 LR Rimfire Conversion Kit Purchasers:
“Get it. Bought this for my Rock River AR. Bolt system goes in [easily] and fits perfectly. Took it to the range and put over 150 rounds through, only failing to feed/fire two rounds. I most definitely recommend this product to anyone looking to shoot their standard AR-15 .223 rifle on a budget.” — Pew P.
“I got this just yesterday and in two days time I have put a couple thousand rounds through it and no hick-ups. I have no complaints.” — Seth
“Best buy for anyone during this ammo crisis. Ammo is extremely expensive and hard to find. It was a ‘no-brainer’ once I found this kit. Ran 200 rounds to break it in for about $20 and had maybe 3 failures. Accurate up to 50 yards (I haven’t tried further) without optic adjustments.” — Joshua M.
“Purchased one of these in January. Took it to the range shortly after for my daughters to try out. We have three ARs and this thing functioned flawlessly. We practiced swapping out the 5.56 carrier with this back and forth, flawless. Enjoyed it so much now I’m purchasing another one.” — J.B.
“Great product. I bought this due to the high cost of ammo. I wanted to still shoot my AR and this was an alternative. This thing works great… works flawless with different types of .22 LR, from premium CCI to the cheap stuff. I recommend this to anyone thinking about getting one.” — Thom
* You can get also CMMG Conversion Kits from Brownells with one (1) 25rd mag for $219.99, or with three (3) 25rd mags for $249.99. There is also a CMMG kit with three (3) 10-rd mags for $249.99 for areas with capacity restriction.
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Good news for serious hand-loaders — a large selection of premium-quality Lapua brass is now IN STOCK at Creedmoor Sports and Grafs.com. You’ll find a wide variety of cartridge types available for purchase today at these two leading vendors. Check the lists below.
We’re happy to report that Lapua Brass is IN STOCK, because finding top quality reloading components (brass, bullets, powder, and especially primers) has been a major challenge over the past year. It looks like both Graf & Sons and Creedmoor Sports have received large shipments of Lapua cartridge brass recently. So if need good brass, check the availability list below, and then place your orders. Sorry, no 6mmBR, 6.5 Grendel, 6.5×55, 7mm-08, or .30-06 brass at either vendor right now.
As of 9:00 am on Saturday July 17, 2021, here are some of the rifle cartridge types we found in stock.
Lapua .220 Russian Brass $128.29
Lapua .223 Rem. Brass $68.99
Lapua 6mm Creedmoor Brass Small Primer Pocket $55.99 (50 ct)
Lapua .243 Win Brass $120.99
Lapua 6.5×47 Lapua Brass $134.99
Lapua 6.5 Creedmoor Brass Small Primer Pocket $103.99
Lapua .260 Rem Brass $120.99
Lapua .284 Winchester Brass $144.99
Lapua 7.62×39 Brass $85.99
Lapua 7.62x54R Russian Brass $158.99
Lapua 7x65R Brass $119.99
Lapua .300 Norma Magnum Brass $226.99
Lapua .338 Norma Magnum Brass $328.99
Lapua .338 Lapua Magnum Brass $321.99
CLICK HERE for Grafs.com Lapua Brass Sales Page
NOTE: On that page, items IN STOCK are listed first. You can Login to be notified when out-of-stock items are back in stock. Prices subject to change.
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This photograph and all images for this story are by Bill White, aka “CT10Ring” in our Forum.
AccurateShooter Forum member Bill White (aka “CT10Ring”) is not your typical member. For 37 years, Bill worked in NYC as a studio photographer specializing in still lifes and products. A neighbor visiting Bill’s home in Connecticut with a .270 Sako inspired Bill to revive his interest (obsession?) with shooting after a 25-year drought. And he owns a few Sakos now! With his gun hobby renewed, for many years Bill drove to the Western USA to shoot long range steel and a LOT of prairie dogs in season. He loved the life of the varminter, so it made sense for him to move West after retiring. He choose Idaho as his new home.
From his Idaho base, Bill enjoys long-range target shooting. But his favorite gun pastime has been varmint hunting in nearby states — the Dakotas, Montana, and Wyoming. Bill found prairie dog shooting rewarding and mapped out a western circuit route of ranches and National Grasslands in SD, ND, MT, and WY. Every year he loads up his truck and hits the road, often doing a grand circle route, visiting prairie dog havens in multiple states. In this article we feature photos from Bill’s annual “grand circle” varmint safari.
For his many cartridge types, Bill learned about reloading methods, loads, and vendors (and more) primarily from AccurateShooter.com. We start today’s story with the biggest caliber rifle he shoots regularly, his 6.5-284 Winchester. Bill favors this rig for his long-range steel shooting. He also uses it for prairie dog shooting, but only “sparingly”, because he wants to preserve barrel life, and he has many other dedicated varmint rigs.
6.5-284 for Long Range Steel Targets (and Sometimes Varmints)
In his home state of Idaho, Bill likes to shoot steel at long range. For distance work, Bill favors his McMillan-stocked 6.5-284 Win. This rifle was crafted in 2012 by Bob Green of York, PA, using a 1:8″-twist 28″ Krieger HV barrel (.298″ neck). The trued Rem 700 action was purchased from Long Rifles in Sturgis, SD. Bill did the Cerakote and bedded the action. For his 6.5-284, Bill loads 139gr Lapua Scenars, H4831sc powder and BR2 primers. He shoots both steel and varmints with this rifle, but the varmint work is limited because the 6.5-284 cartridge tends to be a barrel burner. The photo below from an Idaho range was taken near a 500-yard target, looking back at the firing line.
In the Varmint Fields — Traveling Light
Once situated, Bill (shown above) prefers to walk to Prairie Dog towns with a shooting mat, two bipod-equipped rifles slung up, rear bag, water, and his trusty Leica 10X42 GeoVid binoculars. While he has used a portable bench, he prefers to shoot from bipod, firing down from a mound if possible. This allows him to set up a line-of-fire that minimizes cross-wind effects. Bill notes: “While I often start early, end-of-day shooting has worked worked well for me. A setting sun shows targets better, the wind is usually down, and it’s not so hot. Often you can spot the bullet trace and that’s fun.”
Eight Great Varmint Cartridge Types — .204, .224, .243 Calibers
Here is one of Bill Reid’s 6mmBR (6BR) rigs. Like his Sako 6 PPC, this is exceptionally accurate.
Bill has a large rifle collection, most of which see duty in the varmint fields of Montana, North Dakota, South Dakota, and Wyoming. Here are his key “take-aways” for his eight favorite varmint chamberings: .204 Ruger, .223 Rem, .22-250, .22 BR, .22-243, 6 PPC, 6mmBR, and 6-6.5×47 Lapua (aka 6×47).
.204 Ruger — This delivers great velocity with the little .20-caliber bullets, with mild recoil. The .204 Ruger easily reaches out to 400 yards, but heavier winds do move the tiny bullet around. Tremendous splat factor under 250 yards. I use Sierra 39gr bullets with IMR 8208 XBR in a Sako 75. Even now, .204 Ruger ammo is relatively easy to find.
.223 Remington — Probably the most popular centerfire rifle round in the USA, the .223 Rem offers inexpensive brass, and is a great choice for AR-15 owners. If you run short on ammo, you can find it nearly everywhere. I often bring one AR-15 and one .223 Rem bolt gun on varmint safaris. My Rem 700 5R 1:9″-twist barrel likes 53gr V-Max bullets.
.22 BR — My .22 BR is my first choice for most prairie dog missions. Accuracy is superb with necked-down 6mmBR Lapua brass — quarter-MOA and blazing fast. With the right twist rate, this chambering can shoot anything from 40gr FB bullets to 80gr VLDs. Load development is easy. Below is my .22 BR ammo for another varmint trip. I use 55gr Sierra BlitzKings with Varget in my 1:12″-twist Shilen-barreled rifle. 60gr Bergers are very accurate with a fairly flat trajectory for useful distances.
.22-250 Rem — A classic varmint cartridge, the .22-250 with 50gr V-Maxs delivers spectacular hits. If three P-Dogs happen to be lined up, I’ve witnessed one .22-250 shot take ‘em all out with a triple hit. I currently have five .22-250-chambered rifles: 3 Sako 75s, one Rem 700, and a single shot Nesika that shoots tiny groups. I favor the very deadly Berger 52gr Varmint HP. Making a custom .22-250? With a 1:8″-twist barrel you can use the full weight range of .22-cal bullets, while spinning the lighter bullets fast for “red mist” effect. Remember this cartridge can be a barrel burner. Don’t shoot too many rounds too quickly.
.22-243 Win — This wildcat is even more potent than the .22-250, delivering devastating results on P-Dogs. Run a .243 Win case slowly through a full-length .22-243 die, with plenty of lube to form the brass. I start with Lapua .243 Win brass. There can be some issues necking-down the brass. Watch for donuts forming at the neck-shoulder junction. I bought my .22-243 rifle not sure how it would perform. But now I love shooting it. My .22-243 delivers half-MOA groups with 41.0 grains RL-22 and Hornady 75gr Amax bullets. With those 75-grainers, it’s great in the wind and good to 600 yards easily.
6 PPC — You may consider the 6 PPC a benchrest competition cartridge only, requiring fire-forming. However I have an original Sako 75 single-shot 6 PPC rifle that I load with Sako-headstamp 6 PPC brass (see below) so no fire-forming is required. This Sako 75 came with a test target that measured 0.113″! With my 6 PPC Sako, I found that 58gr V-Maxs, pushed by Vihtavuori N133, are potent out to 300 yards.
6mmBR — The 6mmBR Norma (6BR) offers a nearly unbeatable combination of accuracy, efficiency, and tunability. With the 6BR and a fast twist barrel, you can shoot everything from 40gr flat-base bullets to the latest 105-110gr match bullets. I load Lapua brass, Vihtavuori N135, and Hornady 58, 65, and 75gr bullets for my Krieger 1:14″-twist HV barrel. While this cartridge is capable of long-range accuracy, I usually limit my 6BR shots to 350-400 yards.
6-6.5×47 Lapua — In this story’s lead photo is my 6-6.5×47 Lapua varmint rifle, with Surgeon action and Manners stock. I Cerakoted the barreled action and then bedded the action. Shown below is 6-6.5×47 ammo I loaded for recent testing. Note how I separated different bullets and powder loads into multiple, labeled bags. Hodgdon H4350 is a great choice for this cartridge — 39 grains H4350 with 105gr Amax was the winner here, but 88gr Bergers also shot well. This cartridge has tremendous “critter dismantling” abilities out to 600-700 yards.
Six Tips for Novice Long Range Varmint Hunters
1. Take twice as much ammo you think you may need. The fields could be particularly rich, or, because of wind or other variables, you may have far more misses than expected.
2. When possible, set up with the wind at your back (or, alternatively, directly ahead). This will minimize the effect of cross-winds. Set up a stake with a ribbon to show wind direction.
3. Bring at least two rifles. Ideally one would be a low-recoil rifle with cheaper components for the closer shots. Then bring a rifle with higher-BC bullets for longer shots where wind is a bigger factor.
4. Check the weather before you head out. Prairie dogs like sunshine and calm conditions. If a cloudy, very blustery day is predicted, considering staying in town and cleaning the rifles.
5. Bring plenty of water on a trip. An adult male should be drinking at least 64 ounces of water (or other liquid) every day — more if it’s very hot or you are sweating a lot.
6. Preferably always hunt with a companion. If you do go out solo, have a Garmin inReach SatComm/GPS for emergencies if there is no cell coverage in your location.
Veteran Varmint Hunter Shares his Secrets
Where to Find Abundant Prairie Dogs — Generally, black-tailed P-Dogs are found in the Western high desert, in the same states/areas where cattle are raised. You’ll find good hunting in Montana, North and South Dakota, Colorado, and Wyoming. There are good hunting grounds on private ranches, BLM tracts, and U.S. National Grasslands. To find specific locations, I’d suggest calling the USFS, BLM, and State Fish & Game. Some have lists of ranches that allow P-Dog shooting. Give the agencies a call before your trip and then check in with ranchers. IMPORTANT: You need a current hunting license in some states.
How to Connect with Ranch Owners– A good varmint adventure can begin with a local connection. Stop into the local Ag/feed store and the town breakfast spot. I bet you’ll find some retired ranchers having coffee together who may direct you to a place that needs rodents thinned out. Let’s say you’re in Roundup, Montana. Stop by a local store and ask what ranchers allow PD shooting. Keep in mind that ranchers may be wary of allowing a total stranger to sling lead on their place. Show respect and if you had a good experience, send a thank-you note. A guided shoot is worth considering — the outfitter will know where the P-Dogs are and he has arrangements with landowners. He may even supply benches. I’ve taken two guided trips, with excellent results, one near Sturgis, SD, and the other on Sioux tribal land near Rosebud, SD.
Getting Set Up — I start early in the a.m. to mitigate mirage. Plus there is usually less wind at that hour. I prefer to drive to within half mile or so of a PD town, then walk and shoot prone. Most shooters like to set up a rotating bench on a knoll. This is a tried-and-true way to shoot long distances accurately, especially if you are on top of a hill and can shoot 360 degrees. I once shot from a rotating bench, but I prefer walking now. Some country is quite stunning and that’s half the fun — being out in nature. But yes there are negatives to shooting prone — ground hazards and tall grass can impede your vision.
Equipment for a Serious P-Dog Safari — In the field, I normally carry two rifles with Harris 9-13″ bipods, backpack, a rolled-up shooting mat, at least two liters of water, food, ammo, two rear bags, and binoculars. A good laser rangefinder comes in handy. If you prefer shooting from a bench you may want to have a front rest and a spotting scope. Many guys will shoot prone from the bed of a truck. That gets you off the ground without the need to haul around a heavy bench. But some locations restrict vehicles. Before a P-Dog trip, I make a detailed pack list and check off as I load my truck and camper. I would suggest bringing waterproof rubber or muck boots. June in South Dakota can be cold and wet, and the mud there is not to be believed. Don’t attempt to drive off road in it!
It’s good insurance to bring an extra 5 gallons of fuel for your vehicle in a jerry can and 2 gallons of H20. There may be NO shade for miles and dehydration is a real possibility. Having a couple heavy duty tarps will provide a sun shade and cover your gear in a rainstorm. I bring a 16″ X 20″ plywood target backer, a stand, and paper targets. This allows me to check zero on each rifle before I head out to the Dog Town.
Western Varmint Country Vistas
Taking Photos on Shooting Adventures
Bill knows a thing or two about taking pictures, having been a professional photographer in NYC for many decades. He uses modern digital cameras for both his outdoor and indoor work. Most photos in this story were taken with a Canon EOS 5DSR MKIV. We asked Bill for some tips on taking good photos. Here are his FIVE Top Tips for Photography:
1. Take photos in the early a.m. and later p.m. when the light has definition. Mid-day results will not be so nice.
2. Use the highest-resolution camera available that fits your budget. Yes lens quality, focus, and exposure controls make a big difference.
3. When feasible, shoot using a manual setting with the lens wide open (for shallow focus). Set the focus on the most important object/subject in the frame.
4. Photoshop is useful, especially when RAW images need to be corrected to show the scene more faithfully, or enhance it.
5. After you take a picture, before you post it on social media, learn to crop the image, straighten the horizon, and do other basic fixes. This can make a big difference.
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The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!
20 Practical Ultimate Varminter
Varminter Kevin Weaver, who shoots both the 20 Practical and 20 Tactical, states that: “Both the 20 Tactical and the 20 Practical are fine .20 caliber cartridges. However, my favorite would be the 20 Practical. The 20 Practical gives the SAME performance as the 20 Tactical without fire-forming, or having to buy expensive forming dies.
John Illum’s Rampro actions are chrome-moly steel. Commonly you’d see them blued, but I had him put a brushed nickel finish on the action and rings. From a few feet away it looks like stainless. The trigger is Illum’s own design set at 8 ounces, and there’s no creep that I can detect. The action has Remington barrel threads and will accept Remington type triggers. One neat thing is that the action was milled with an integral recoil lug (much like the current Surgeon Action). And the bolt is milled all in one piece–no soldered-on handles. My only gripe with this bolt handle is that it could be a tad longer, but it still is manageable for a single-shot. You’ll also note how slick and streamlined the scope rings are. Illum made those as well. His rings mount to the action via two screws from the inside of the ring, a very elegant set-up for sure. (I currently have a 6.5-20x40mm Nikon scope on this gun. If I had to do this project over again the only thing I would change would be installing a 30mm scope because I like ‘em!).
Handgun Handling Tips
Load Development and Accuracy
Pistol Action Legal Issues
I think these sub-caliber rounds, both 20s and the 17s, are the future of recreational varminting, at least out to medium distances. The Twenties offer low recoil, excellent accuracy, and components keep getting better and better. The bullet-makers are finally making high-quality bullets in appropriate weights. Compared to something like a 22-250, I’ve noticed that my 20 PPC rifle has a lot less noise, a plus when you want to be quiet around other people and varmints.
I first tried factory ammo, loaded with Hornady 32gr and 40gr V-Max. The 32gr load shot the best — five-shot groups were slightly larger than a half-inch at 100 yards. My dad heard that Alliant Reloder 10X was a good powder for this cartridge, and he worked up a load using the Sierra 32gr BlitzKing bullet. He found that 26.5 grains was the right amount for his rifle. Considering that my rifle was probably made on the same day, having a consecutive serial number, I decided to try my Dad’s load, along with a half-grain up and down: 26, 26.5, and 27 grains of powder. I, too, found that my rifle prefers 26.5 grains of RL 10X. With this load, I could shoot consistent quarter-inch, five-shot groups at 100 yards. Cartridge OAL is 2.353″, or 1.990″ measured from the ogive.
I estimate I bagged about 250 prairie dogs during each trip, meaning about 500 in total for this season. There were misses, of course, but those are generally 400 yards and beyond, when wind becomes too much of a factor, or shooter error. And, for each trip, I managed to get two or three “doubles,” which is lingo that means that a single bullet results in two dead prairie dogs. Prairie dogs tend to congregate, and when they do, “doubles” become possible, and “triples” are not out of the question. One of these “doubles” was clearly visible through my scope.
My first trip to South Dakota, at the end of June, offered a unique oppor-tunity, since First Stop Guns was having a show that coincided with my time in the area. Dan Cooper, founder and owner of Cooper Arms, was present at the show. My dad and I decided to host a small dinner at my parents’ new home, and we invited Dan Cooper and others. I brought tenderloin steaks from California for this. In addition to Dan Cooper, Mark and Steve Blote of First Stop Guns, along with Paulette Kok of Dakota Arms, attended the dinner. It was a pleasure and honor to be in their company. They’re all very personable.
Good news for serious hand-loaders — a large selection of premium-quality Lapua brass is now IN STOCK at 
Bill knows a thing or two about taking pictures, having been a professional photographer in NYC for many decades. He uses modern digital cameras for both his outdoor and indoor work. Most photos in this story were taken with a Canon EOS 5DSR MKIV. We asked Bill for some tips on taking good photos. Here are his FIVE Top Tips for Photography:
