Adam Scepaniak, of The Guns and Gear Store, has written an interesting story about Prairie Dog Hunting in North Dakota. If a P-Dog safari is on your “bucket list”, you’ll want to read the full story in the Sierra Bullets Blog. Adam provides many tips that can help you plan a successful prairie dog adventure.
Prairie Dog Hunting in North Dakota with Sierra Bullets
It’s that time of year where lots of men and women point their vehicles westward and try to push the limits of their rifles on prairie dogs. [A few seasons back] I was a part of this group of people… while in northwestern North Dakota. CLICK HERE to Read Full Story.
Little Missouri National Grassland
Once my hunting party arrived at the Little Missouri National Grassland in North Dakota we immediately began scouting for prime prairie dog towns. There is a certain amount of strategy involved in choosing a prairie dog town … for several reasons. For one, you should try to always stay “above” the prairie dogs.
Small objects like rocks, cactuses, and prairie vegetation can easily obstruct your view if you’re shooting prone on a level plane. We encountered this in the first small prairie dog town we stopped and shot at. The prairie dog town was very visible while walking and standing, but once we laid down with our rifles on bipods the two-foot prairie grass became a severe obstruction. We shortly moved on because the small town became quick-studies to our shooting.
The second prairie dog town we hunted was at the base of a small ridge with a dried, cattle creek at the bottom. This area offered better shooting opportunities because we were above most of the prairie dog holes, and if we were not above them, a deep ravine separated us from the prairie dogs removing any obstructions from our rifle scopes which was our previous problem. This area had its own disadvantage though because of some other wildlife present. There were approximately fifty head of cattle in our close vicinity grazing, which was to no surprise because many ranchers utilize the National Grassland for grazing. We had to wait for the cattle to leave our area as to not have an incidental hit due to a rare ricochet. As the sun passed over the horizon we decided to return to this spot the next morning, but would change our shooting position to increase our advantage.
This Location Offered a Nice Overlook.
Zoomed Image Shows Individual Prairie Dog Mounds.
My previous varminting best was a 275-yard shot near Mobridge, South Dakota on a separate prairie dog hunting trip. With more experience and better reloading, Here in North Dakota I was able to make a solid hit on a prairie dog just over 400 yards which made me ecstatic! For a central Minnesota, shotgun-raised guy, I was pretty happy that my bullet selection and hand-loading ability produced a 125-yard improvement.
Once we cleaned and cased our rifles for the journey home we had shot a little over 200 rounds of my Sierra® reloads. This was a lot less than previous prairie dog trips I have been a part of, but our hit percentage was substantially higher as well. Traveling into a new area meant a lot more scouting and experimentation for us as a group. In future trips or hunts of your own, it can be very beneficial to schedule an extra day just for scouting[.]
Little Missouri National Grassland is a National Grassland located in western North Dakota. At 1,033,271 acres, it is the largest grassland in the country. Within its borders is Theodore Roosevelt National Park. The Little Missouri National Grasslands was once a part of the Custer National Forest, but is now a part of the Dakota Prairie Grasslands, a National Forest unit consisting entirely of National Grasslands. A predominant feature of the grassland is colorful and beautiful badlands, a rugged terrain extensively eroded by wind and water. It is a mixed grass prairie, meaning it has both long and short grass.
The boundaries of the grasslands on certain maps can be misleading. Within the boundaries of the national grassland are significant portions of state-owned and privately-owned land, much of it leased by cattle ranchers for grazing.
The grassland is administered by the Forest Service as part of the Dakota Prairie Grasslands from offices in Bismarck, ND. There are ranger district offices in Dickinson and Watford City.
At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
1. Palmetto Armory — Savage A17 .17 HMR American Flag Model
The 4th of July is just five days away. What better way to celebrate the nation’s birthday (and your Second Amendment freedoms) than with a new rifle sporting the Stars and Stripes. With its handsome American Flag-theme stock, this semi-auto Savage A17 features a 22″ barrel chambered for the .17 HMR rimfire round (10-rd magazine). We’ve used A17s and they are fun and surprisingly accurate. This American Flag model A17 is $440.98 at Palmetto State Armory.
2. Grafs.com — Free Reloading Scale with $75 Sierra Purchase
⏺ FREE Scale — Great for Loading at Range or Weight-Sorting Components
Even if you have a high-end force restoration scale and/or a electronic powder dispenser, it’s great to have a compact digital scale for weight-sorting components and loading at the range. Right now Graf’s will give you a FREE Frankford Arsenal DS-750 Digital scale with a modest Sierra purchase. Buy at least $75.00 worth of Sierra bullets (all types) or Sierra loaded ammo and you get the DS-750 scale for free.
3. Palmetto Armory — Buck Mark Camper UFX Pistol, $299.99
⏺ Very Accurate, Legendary Reliability, Great Ergonomics
The Browning Buck Mark is a classic, and for good reason. These pistols are reliable, well-balanced, have a good trigger, and they are very accurate. And now you can get one for under $300.00. Palmetto State Armory has the Browning Buck Mark Camper UFX with 5.5″ Barrel on sale for $299.99, discounted from $340.89. This Buck Mark Camper UFX is a great .22 LR pistol, at a very attractive price.
⏺ Read Wind Speed and Direction, Peak Gust, Temp, Humidity, and More
Very popular with Amazon buyers, the impressive Kestrel 3000 enjoys 86% 5-Star Ratings. This versatile Weather Meter records wind speed, wind gust, average wind speed, temperature, humidity, dew point and more. Every precision shooter should have a wind meter, and this is an affordable entry-level unit. NOTE: This Kestrel 3000 does NOT include built-in Applied Ballistics software (to get that feature you’ll have to pay $599.00 for a Kestrel 5700). No worries — you can run a separate mobile App on your phone, such as Ballistic, which uses the JBM Ballistics engine and costs just $12.99.
⏺ Gauge Tool plus 5 Bushings, Essential for Precision Hand-loading
Are you checking your headspace to ensure you’re pushing your shoulders back the correct amount? If you’re not using a tool like the Hornady Headspace Gauge with 5 bushings then you are just guessing and you’ll never know for sure. Using one of these headspace gauges is one of the best ways to control your full-length sizing and thereby improve the consistency of your handloads.
Here’s a very good mat for just $29.99. This NcStar Vism shooting mat boast decent padding, and reinforced areas for elbows and knees. Full dimensions are: 69″ Long x 35″ Wide. This mat has straps for pre-loading your bipod. When you’re done simply fold in the edges, roll it up into a compact 19.50″ W x 8.50″ H package — the size of a sleeping bag. You can pay twice as much for a shooting mat and not get much more quality. This mat has earned 85% Five-Star buyer ratings on Amazon.
7. MidwayUSA — Dual Steel Gong System with Frame, $71.99
⏺ Twin AR500 Steel Gongs, Easy Set-Up and Take-Down
Who doesn’t like shooting steel? The “clang” of hitting a steel target at long range provides instant gratification. This patented Viking Solutions Gong Target System features two 3/8″-thick, AR500 Steel Gongs (8″ and 10″) suspended by chains. The support frame consists of 2 leg stands and 2 crossbar sections. Assembled, the crossbar is 32″ above ground level. Right now this unit is on sale for $71.99 — 20% off the regular price.
8. Amazon — Long Range Shooting Handbook, $19.85
⏺ Most Popular Practical LR Training Book, Respected Author
Ryan Cleckner’s Long Range Shooting Handbook is the best-selling modern book on practical rifle skills. Ryan Cleckner’s Long Range Shooting Handbook is designed as an intro to important fundamental concepts such as MOA vs. Mils, External Ballistics, and Environmental Effects. Included are personal tips and advice based on Cleckner’s years of experience as a sniper instructor and special operations sniper. You can view Sample Chapters on Amazon.com.
The Long Range Shooting Handbook is divided into three main categories: What It Is/How It Works, Fundamentals, and How to Use It. “What It Is/How It Works” covers equipment, terminology, and basic principles. “Fundamentals” covers the theory of long range shooting. “How to Use It” gives practical advice on implementing what you’ve learned, so you can progress as a skilled, long range shooter.
⏺ Everyone Can Use This — Four Driver types (51 pieces) at Great Price
This Outers-brand, 51-piece set contains all the drivers you could ever need: Flat-head, Phillips, Hex (Allen), and Torx. Priced under ten bucks, this driver set offers great value for the money. Even if you already own high-quality Allen and Torx wrenches, you can buy this as a spare set for your gun room. And this also makes a great holiday “stocking stuffer” for gun guys. These drivers work great for installing scope rings or bases, or everyday use around the home.
• Molded Driver with Magnetic Tip
• 15 Flat Head Bits
• 10 Hex Bits (inch)
• 9 Hex Bits (metric)
• 4 Phillips Bits
• 9 Torx Bits
• 2 Extra Long Phillips Bits
• 1 Hex to Square Adapter
10. Amazon — Howard Leight MAX Earplugs, $8.60/50 Pairs
20 Pairs
50 Pairs
⏺ Best NRR (33 dB), Very Comfortable, Great Value
These Howard Leight NRR 33 Max Plugs are your Editor’s favorite foam earplugs. Between shooting, motorcycling, and mowing lawns, I probably have Max plugs in my ears 2-3 days a week. This is a very good price for a bulk pack of 50 pairs. NRR 33 is the best Noise Reduction Rating you’ll find for plugs alone. And if you act soon, you can get free shipping to boot.
For load development, some guys shoot 3-shot groups. Other guys shoot 5-shot groups, or even 10-shot strings. But for testing its projectiles, Sierra Bullets takes it to another level entirely. A while back Sierra was testing its .30-Caliber 175gr HPBT MatchKing in the Sierra underground tunnel. The results appear above — a FIVE HUNDRED Round group!
500 Shots Form 0.82 MOA Group at 300m (328 yards)
The photo above shows the result of 500 shots taken in a 300 meter test tunnel. Sierra’s trigger-pullers sent five full boxes of bullets down-range at a single target. The raw group size, edge to edge of the farthest shots, is about 3.13 inches, as shown on the calipers’ metal linear scale. Subtract a .308″ nominal bullet diameter* to get the 2.823″ on the digital readout. So you’re seeing a 2.823″ group at 300 meters (328 yards). One MOA at this distance is 3.435″ so this 500-round group is 2.823 divided by 3.435 or 0.82 MOA (0.8218 MOA to be precise).
This 500-round group was shoot as part of a pressure/velocity test for a commercial customer. The cartridge was .308 Winchester, loaded at 2.800″. The powder was Reloder 15. A 26″ barrel was shot from a return to battery rest. The gun was cleaned every 125 rounds and two foulers shot.
What do you think — could you beat this group from a bench for 500 rounds?
One Facebook poster joked: “500-round group? Everyone knows anything less than 1000-round groups are a waste of time and statistically irrelevant.”
Sierra’s 300 Meter Testing Tunnel
Ever wonder how (and where) Sierra tests its bullets? The answer is underground, in a 300-meter test tunnel located under Sierra’s factory in Sedalia, Missouri. The photo above shows the construction of the tunnel back in May, 1990. Like most bullet manufacturers, Sierra does live-fire bullet testing of its projectiles. Sierra’s 300-meter test range is the longest, manufacturer-owned underground bullet test facility in the world. Sierra offers free tours of the test tunnel as part of Sierra’s Factory Tour Program.
* Normally, to get an exact group size, you should subtract the TRUE bullet hole size, which is usually smaller than the nominal bullet diameter. E.g. a .308 bullet hole may show on paper as .298 or so. But here, for simplicity, we are subtracting .308″ because we do not have the original target to measure.
The folks at Sierra Bullets asked a few staff bulletsmiths a classic question about guns: “If you could own only one firearm which one would you choose?” There were many interesting answers including a “cheater” response — the drilling — which is really two guns in one. The most-often mentioned chambering was the venerable .30-06. Respondents cited its versatility, hunting prowess, and ready availability of ammo. The popular .308 Winchester, as expected, got mentions as did its cousins the .243 Win and 7mm-08. There were quite a few votes for classic lever guns, as well as 12-gauge shotguns. Two bulletsmiths cited the .22 LR, and we can certainly see the logic in that answer. The little rimfire cartridge is versatile, quiet, and inexpensive.
We ask our readers the same question — if you could only have one long gun, what type of firearm would it be? List the gun type and chambering in the comments section.
If You Could Have Just One Long-Gun — ANSWERS:
Media Relations Manager Carroll Pilant answered: “I would NEVER own only one gun. If I HAD to pick one, it would be a drilling in 12 gauge over .30-06.”
Ballistic Technician Rich Machholz answered: “The early tang safety Ruger M77s pretty much have all you could want in a bolt gun, but I do like the Winchester lever guns and the combination guns, particularly the drillings. Since I have the first two, I’m going for a Doug Turnbull 1886 or a side by side 20 gauge over .223 drilling.”
Ballistic Technician Philip Mahin answered: “More than likely it would have to be a bolt action .30-06. The reliability is legendary on a wide range of game animals and factory ammunition has still been available at my local stores even in these tough times.”
Ballistic Technician Duane Siercks answered: “If I had to boil it all down to one gun, it would probably be a .30-06. I have a Remington 700C (custom shop gun) that has worked very well for anything and everything I have ever wanted to do with it.”
Ballistic Technician Paul Box answered: “A .22 Rimfire.”
Chief Ballistician Tommy Todd answered: “Remington 700 in .308 Winchester.”
VP – Sales & Marketing Matt Reams answered: “A light weight Kimber in 25-06.”
Production Toolsetter Brad Vansell answered: “Savage weather warrior 7mm-08 is my rifle of choice.”
Production Toolsetter Dan Mahnken answered: “The .308 Winchester rifle — [based on the] wide range of bullets made and the wide range of things that one can hunt with it.”
Process Engineer David Palm answered: “Savage action 243 Winchester.”
Ballistic Technician Gary Prisendorf answered: “Probably a .22 LR. It may not be the best choice, but you could use it for about anything if you really had to.”
Production Manager Chris Hatfield answered: “Beretta A300 Outlander 12 gauge.”
As folks are stuck at home with the Pandemic lock-downs, many guys are thinking about projects involving their AR-15s sitting in their safes. We’ve seen some threads in our Forum asking about the .224 Valkyrie, an AR-centric cartridge that offers significantly better long-range performance than the .223 Remington (5.56×45). If you own a .224 Valkyrie, or are thinking about adding a .224 Valkyrie upper to your MSR (Modern Sporting Rifle) arsensal, here is load information from industry leaders Hodgdon and Sierra.
With the 90gr SMK (or similar High-BC projectiles), the .224 Valkyrie offers ballistics similar to the 6.5 Creedmoor but with significantly less felt recoil.
Hodgdon has reloading data for the .224 Valkyrie, a popular new cartridge optimized for the AR15 platform. “At Hodgdon, we’ve been researching this cartridge since before its introduction and are excited to release load data for the Valkyrie featuring powders like Hodgdon CFE 223, IMR 8208 XBR, and Hodgdon Varget” reports Ron Reiber, Hodgdon product manager/ballistician. Access the .224 Valkyrie Data via Hodgdon’s Reloading Data Center.
While new load data will continue to be updated, there is currently data for 80 different loads with bullet weights ranging from 50 to 90 grains. NOTE: The load data covers Hodgdon, IMR, and Winchester brand powders only. See Sierra Data for other powder brands. Bullet brands included are: Federal, Hornady, Nosler, Sierra and Swift.
About the .224 Valkyrie Cartridge
Basically a 6.8 SPC necked down to .22, the Valkyrie has a shorter case than the .223 Remington (and 5.56×45 NATO). This allows you to load the longest, heaviest .224-caliber bullets and still feed reliably from an AR15-type magazine. Designed to rival the .22 Nosler while still running well in ARs, the .224 Valkyrie offers excellent long-range performance when loaded with modern, high-BC bullets. We expect some bolt-action PRS shooters might adopt the .224 Valkyrie. Why? Reduced recoil. With the 90gr SMK, the .224 Valkyrie offers ballistics similar to the 6.5 Creedmoor but with significantly less felt recoil.
The new .224 Valkyrie has already developed a loyal following: “Shooting heavier bullets in an AR-platform rifle that maintain supersonic speeds beyond 1,300 yards has captured the interest of shooters and handloaders everywhere” — Hodgdon Powders
Our friend Gavin Gear of Ultimate Reloader.com found a superbly accurate load with Berger 80.5gr bullets.
IMPORTANT: Check Out Sierra’s .224 Valkyrie DATA
Sierra Bullets has also published extensive load data for the .224 Valkyrie. This covers over a dozen powder types — many more than the Hodgdon database. Sierra’s .224 Valkyrie load data covers projectiles from 50 grain all the way up to 95 grains. With the 90 to 95 grain bullets, the little Valkyrie can give 6mm match cartridges a real run for their money — offering similar ballistics with less recoil. When selecting a barrel for the long .224-cal bullets, specify a fast enough twist rate: “Sierra recommends a 1:6.5″-twist barrel for the #9290 22 cal 90 gr HPBT bullet. However, for cartridges like the Valkyrie, that can push them over 2650 fps muzzle velocity, a 1:7″-twist barrel will stabilize the bullet correctly.”
There are tens of thousands of products on display at SHOT Show, the world’s largest firearms industry trade show. On Day Two of the event, we visited many manufacturers to see their featured items, and new products for 2020. The vendors included McMillan Fiberglass Stocks, Forster Products, ELEY, G.A. Precision, Tikka/Sako, Gunwerks, Sierra Bullets, and more. Here are some interesting products as well as some eye-catching product displays.
Ballistic-X App Guru at SHOT Show
At the McMillan Fiberglass Stocks booth we met Jonathan Roberts, the talented computer wiz who created Ballistic-X software. This iOS/Android smartphone App quickly and easily calculates group sizes. Take a photo of your target, set some values (such as bullet diameter and distance to target), then use the touchscreen to place circles around each hole. The App will calculate group size (in MOA or Mils), distance to point of aim, and provide all the info in an overlay. Then click “save” to record your group for posterity!
Bright Red Record-Setting Rimfire Rifle
At the ELEY booth, we saw a stunning red rimfire rifle that belonged to our friend Dan Killough of Killough Shooting Sports. Dan used this rimfire benchrest rifle to win many matches and set a range record or two over the years. That is Dan in the upper left in the photo below.
David Tubb’s 33XC and 37XC — Big Cartridges for Big Guns
David Tubb, 11-time NRA Nat’l High Power Champion and 6-time NRA Nat’l Long Range Champion, had his ELR rifle on display. Using this rifle, David won the 2019 NRA ELR Heavy Gun Championship. David was at SHOT promoting some long-range cartridges — the 33XC and 37XC. In the video below, David Tubb, shooting his 33XC Tubb rifle, makes three consecutive hits at 2200 yards on a 36″x36″ steel plate at Valdina Ranch on 12/2/2018. In March 2019, the Fifty Caliber Shooters Association (FCSA) recognized this as an ELR (Extreme Long Range) World Record.
.22 LR Ammo for Extreme Long Range (ELR)
ELR Rimfire? That may seem like an oxymoron, but actually there are guys now shooting the little .22 LR cartridge at 300 yards and well beyond. You have to cope with some serious drop and drift at that distance, which makes this a good challenge, and great training for centerfire shooting at true Extreme Long Range. Cutting Edge Bullets will be producing .22 LR ammo with higher-BC projectiles optimized for the .22 LR rimfire long-range shooting disciplines.
Very Versatile Tikka T3x UPR
At the Beretta/Sako/Tikka booth, we liked the Tikka T3x UPR Stainless in 6.5 Creedmoor ($1500 MSRP). We liked the stock very much, and thought this was a very versatile gun that could be used for target shooting off bipod, hunting, even PRS, given its detachable magazine. The stock is very ergonomic and feels good. Tikka states the UPR’s stock “features an extra layer of carbon fiber mixed with fiberglass for increased rigidity and accuracy. The stock is coated with a rough surface for the best grip in any condition… choose between single stage or set trigger.”
Stunning Engraved Pistols from Baron Engraving
We stopped in our tracks at the Baron Engraving booth. There, in a glass showcase we saw an amazing selection of engraved pistols — 1911s and Browning High Powers. It’s great to see that the Art of Engraving is still alive and well. Baron engraving also does great work on revolvers and long guns.
Day Two Parting SHOT Photo
TV and film legends Chuck Norris and Lou (“The Incredible Hulk”) Ferrigno teamed up at SHOT Show. Norris drew a huge crowd of fans at the Glock booth.
Sierra Bullets has released very complete load data for the popular 6.5 Creedmoor cartridge. This medium-sized cartridge has become one of the most popular chamberings for tactical and PRS shooters. The 6.5 Creedmoor combines excellent accuracy, good mag-feeding, good barrel life, moderate recoil, and reasonable component cost. That’s why this cartridge has caught on quickly.
Developed in 2007 by Dennis DeMille and Dave Emary, the 6.5 Creedmoor is a shortened and improved 30 TC cartridge case that was inspired by the .308 Winchester design. This short action design was created to maximize case capacity and a wide range of loading lengths, while still fitting in standard short action magazines. With the correct twist barrel, the versatile 6.5 Creedmoor can take advantage of the wide range of bullet weights available in 6.5 mm (i.e. .264 caliber). Reloaders should keep in mind that the 6.5 Creedmoor works best with medium to medium-slow powders such as H4350, Varget, Win 760, and RE-17. The light recoil and adaptability of the efficient 6.5 Creedmoor cartridge has already proven itself in high power, precision rifle series and benchrest competitions. Couple that with respectable barrel life and its intrinsic accuracy potential and you have a recipe for success which should insure its legacy for decades to come.
Here are three tables from the Sierra Bullets Reloading Manual (5th Edition). IMPORTANT — This is just a sample!! Sierra has load data for many other 6.5mm bullet types, including FB, Spitzer, SBT, HPBT, and Tipped MK from 85 grains to 142 grains. To view ALL 6.5 Creedmoor DATA, CLICK HERE.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
Two More Great 6.5 Creedmoor Reloading Resouces
Want More 6.5 Creedmoor Load Info? View Starline’s 6.5 Creedmoor Guide by Gavin Gear:
PRB 6mm Creedmoor and 6.5 Creedmoor Load Survey
The Precision Rifle Blog compiled Load Data from PRS Competitors, for both 6mm Creedmoor and 6.5 Creedmoor. This is a good place to start. PRB surveyed the match loads for “173 of the top-ranked precision rifle shooters in the country”. CLICK HERE.
Based on the questions we get on a daily basis on our 800 (Customer Support) line, twist is one of the most misunderstood subjects in the gun field. So let’s look deeper into this mystery and get a better understanding of what twist really means.
When you see the term 1:14″ (1-14) or 1:9″ twist, just exactly what does this mean? A rifle having a 1:14″ twist means the bullet will rotate one complete revolution every fourteen inches of the barrel. Naturally a 1:9″ turns one time every nine inches that it travels down the barrel. Now, here’s something that some people have trouble with. I’ve had calls from shooters thinking that a 1:14″ twist was faster than a 1:9″ because the number was higher with the 1:14″. The easiest way to remember this is the higher the number, the slower the twist rate is.
Now, the biggest misconception is that if a shooter has a .223 with a 1:8″ twist, his rifle won’t stabilize a 55gr bullet or anything lighter. So let’s look at what is required. The longer a bullet is for its diameter, the faster the twist has to be to stabilize it. In the case of the .223 with a 1:8″ twist, this was designed to stabilize 80gr bullets in this diameter. In truth the opposite is true. A 1:8″ will spin a 55gr faster than what is required in order to stabilize that length of bullet. If you have a bullet with good concentricity in its jacket, over-spinning it will not [normally] hurt its accuracy potential. [Editor’s Note: In addition, the faster twist rate will not, normally, decrease velocity significantly. That’s been confirmed by testing done by Bryan Litz’s Applied Ballistics Labs. There may be some minor speed loss.]
Many barrel-makers mark the twist rate and bore dimensions on their barrel blanks.
Think of it like tires on your truck. If you have a new set of tires put on your truck, and they balance them proper at the tire shop, you can drive down a street in town at 35 MPH and they spin perfect. You can get out on the highway and drive 65 MPH and they still spin perfect. A bullet acts the same way.
Once I loaded some 35gr HP bullets in a 22-250 Ackley with a 1:8″ twist. After putting three shots down range, the average velocity was 4584 FPS with an RPM level of 412,560. The group measured .750″ at 100 yards. This is a clear example that it is hard to over-stabilize a good bullet.
Twist-rate illustration by Erik Dahlberg courtesy FireArmsID.com. Krieger barrel photo courtesy GS Arizona.
Ever wondered what caused a particular bulge or marking on a case? And more importantly, does the issue make the case unsafe for further use? Sierra Bullets Ballistic Technician Duane Siercks offers some insight into various issues and their causes in two Case Diagnostic articles from the Sierra Blog.
Incipient Case-Head Separation
This is a Winchester .308 Win case that has a real issue. This case has a very obvious incipient case head separation in the process of becoming a complete failure.
This is most commonly caused by over-sizing the case causing there to be excess headspace on the case. After a few firings and subsequent re-sizing, this case is just about ready to come completely apart. Proper die adjustment is certainly a requirement here. Of course this case is not safe to reuse.
Excessive Pressure (Load Too Hot)
If you will notice in the picture of the case rim, there are two pressure signs to notice. First, look at the primer. It is basically flattened to about the max of what could be considered safe. If this was the only pressure sign noted, I would probably be fine with this load, but would constantly keep an eye on it especially if I was going to use this load in warmer temperatures. This load could easily cross into the “excess pressure” realm very quickly.
There is another sign of pressure that we cannot ignore. If you’ll notice, there is an ejector mark apparent that is located over the “R” of the R-P headstamp. This absolutely tells us that this load would not have been in the safe pressure range. If there were any of these rounds loaded, they should not be fired and should be dis-assembled. This case should not be reloaded.
Split Case-Neck
Here we have an R-P .22-250 case that has died the death. Everything looks fine with this case except the neck is split. This case must be tossed.
A split neck is a normal occurrence that you must watch for. It is caused by work-hardening of the brass. Brass cases get harder with age and use. Brand new cases that are stored for a period of time can become hard enough that they will split like this case within one to two firings. I have had new factory loads do the same thing. Then as we resize and fire these cases repeatedly, they tend to get harder and harder. Eventually they will split. The life of the case can be extended by careful annealing practices. This is an issue that would need to be addressed in an article by itself. Of course this case is no longer usable.
In the classes that I teach, I try to use examples like this to let the students see what they should be looking for. As always, if we can assist you, whether you are new to reloading or very experienced, contact us here at Sierra Bullets by phone at 1-800-223-8799 or by email at sierra@sierrabullets.com.
Dented Case Body
Here we have a Lake City 7.62×51 (.308 Win.) case with two heavy marks/dents in the case body.
This one may be a bit of a mystery. It appears as if this case may have been caught in the action of a semi-auto rifle when the firearm jammed or the case failed to clear during the cycling process. I probably would not reload this case just to prevent any feeding problems. This also appeared to be a factory loaded round and I don’t really see any pressure issues or damage to the case.
Multiple Problems — Lake City 5.56×45 unknown year.
This case has suffered multiple failures and cannot be re-used. First its has have a very rounded shoulder that is split. Upon first look it was obvious that this round had been a victim of excess pressure. The firearm (perhaps an AR?) was apparently not in full battery, or there was possibly a headspace issue also. While taking a closer look, the primer was very flat and the outside radius of the primer cup had been lost. High pressure! Then I also noticed that there was an ejector mark on the case rim. This is most certainly an incident of excessive pressure. This case is ruined and should be discarded.
It is very important to observe and inspect your cases before each reloading. After awhile it becomes second nature to notice the little things. Never get complacent as you become more familiar with the reloading process. If ever in doubt, call Sierra’s Techs at 1-800-223-8799.
Sierra Bullets has recently released load data for the 6mm Creedmoor cartridge, a necked-down version of the 6.5 Creedmoor, a popular PRS, tactical, and hunting cartridge. Sierra has released very comprehensive 6mm Creedmoor load data, covering fifteen (15) different bullets from 55 to 110 grains. NOTE: Hornady-brand brass was used for Sierra’s 6mm Creedmoor load tests, not the newer, stronger Lapua 6.5 CM brass with small primer pockets. Hand-loaders using Lapua 6.5 Creedmoor brass necked to 6mm may have to adjust their loads.
Sierra writes: “As soon as the 6.5 Creedmoor was released in 2007, a 6mm version was being envisioned. After the 6mm Creedmoor demonstrated its worth at 1000 yards it began to catch the attention of Precision Rifle Series (PRS) competitors. The 6mm/6.5 Creedmoor is a great fit for those looking for an AR platform-friendly cartridge. It delivers velocities very similar to the .243 Win and yet fits the AR10 magazine length[.] The 30-degree shoulder makes this a very efficient case and helps prolong case life as well. The 6mm/6.5 Creedmoor works well with powders such as H4350, RE-17, and Ramshot Hunter for heavier long-range bullet weights. Slightly faster powders such as RE-15, Win 760, and Vihtavuori N540 work well with lighter weight bullets.”
Sierra Bullets Tested for 6mm Creedmoor Load Data
55gr BlitzKing (#1502)
60gr HP (#1500)
70gr HPBT (#1505)
70gr BlitzKing (#1507)
75gr HP (#1510)
In developing its 6mm Creedmoor load data, Sierra tested a very wide selection of propellants, two dozen overall. For the smaller bullets, fast-burning powders such as Benchmark, H4895, and CFE223 were tested. For the heavier 100+ grain bullets, Sierra tested a selection of medium-burn-rate powders including H4350, Reloder 16, Reloder 17, Varget, and Superformance. Sierra did a very thorough job. We know this information will be welcomed by 6mm Creedmoor shooters.
Don’t know what powder to try first? For the 107-110 grain bullets, if you want best accuracy and low ES/SD, our Forum members recommend Alliant Reloder 16 and Hodgdon H4350. If you are seeking max velocity with the 110-grainer, look at Hodgdon Superformance and Reloder 19.
Here are Sierra’s 6mm Creedmoor Load Data Charts for the 107gr MK and 110gr MK. There are a half-dozen other tables for lighter-weight bullets.
Little Missouri National Grassland
Developed in 2007 by Dennis DeMille and Dave Emary, the 6.5 Creedmoor is a shortened and improved 30 TC cartridge case that was inspired by the .308 Winchester design. This short action design was created to maximize case capacity and a wide range of loading lengths, while still fitting in standard short action magazines. With the correct twist barrel, the versatile 6.5 Creedmoor can take advantage of the wide range of bullet weights available in 6.5 mm (i.e. .264 caliber). Reloaders should keep in mind that the 6.5 Creedmoor works best with medium to medium-slow powders such as H4350, Varget, Win 760, and RE-17. The light recoil and adaptability of the efficient 6.5 Creedmoor cartridge has already proven itself in high power, precision rifle series and benchrest competitions. Couple that with respectable barrel life and its intrinsic accuracy potential and you have a recipe for success which should insure its legacy for decades to come.
