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April 9th, 2015

New Remington RM380 Metal-Framed Carry Gun

Remington RM380 .380 ACP test Gunsite

Remington has introduced the brand new RM380, an ultra-small DAO .380 ACP carry pistol. This alloy-framed gun weighs just 12.2 ounces (unloaded), and is very compact, measuring 5.25 inches long. Capacity with flush-base magazine is 6+1, and Remington plans to offer a 7-round magazine with a pinky extension. Because it is hammer-fired, the RM380 has second-strike capability. There is no manual safety.

The RM380 is different that many small .380 ACP pistols in using a locking breech rather than a straight blow-back action. Remington claims this reduces perceived recoil. At a media preview hosted at the Arizona Gunsite Academy, pre-production models were tested. Those examples proved reliable, running extended strings (100+ rounds) without failure. However, testers commented on the long, very heavy, 7.9-pound trigger pull.

Remington RM380 .380 ACP test Gunsite

Remington RM 380 Specifications

Caliber: .380 ACP
Capacity: 6+1 rounds
Weight Unloaded: 12.2 Ounces
Sights: Fixed, F/R

Length: 5.25 inches
Width: 0.94 inches
Height: 3.86 inches
Trigger Pull Weight: 7.9 lbs.

Remington RM380 .380 ACP test Gunsite

Permalink Handguns, New Product 1 Comment »
April 9th, 2015

Die Selection and Reloading for Reliability in AR10s

By Dennis Santiago
Dennis Santiago AR10 diesCompetition teaches you things. Compared to loading for benchrest bolt guns, producing ultra-reliable and accurate ammo for tight-chambered, semi-auto .308 target rifles requires a different approach to case prep. Smoothness of operation is much more important in a field course gun. Reliability trumps everything (even case life) for these types of guns.

In the photo below, there’s a Redding small base body die for bumping the shoulder and making sure the case body is at SAAMI minimum. This body die is not just nice to have. It is vital. There are also a full-length sizing die and a Lee Collet neck-sizer in that turret holder. One or the other gets used after the body size die depending on what rifle the ammo will be used in. The semi-auto rounds always go through the full-length sizing die. After that comes trimming and finally cleaning — then loading can begin. The cases are trimmed using a Gracey trimmer so everything’s the same each and every time. I use an RCBS Competition Seater Die to seat the bullets. One nice feature of this RCBS die is the open side slot that allows you to place bullets easily.

Dennis Santiago AR10 dies

It’s a long path methodology but uniformity is accuracy. More important for safety, controlling “stack-up” errors in the system solution is how one achieves reliability. The chamber-hugging philosophies of benchrest bolt guns do not apply well to AR-10s. Like most things, the right answer is context-dependent. Success is about accepting and adapting.

Dennis Santiago AR10 dies

Dennis Talks About Using a Semi-Auto in Tactical Competitions
I have succumbed to the Dark Side — deciding to put an AR-10 together. For tactical competitions you want a bolt gun most of the time but there are times the course of fire favors the use of a semi-auto. I was using an M1A that gives me 0.75 MOA performance but I heard people were getting almost bolt-gun-level, half-MOA accuracy out of their AR-10s — so I wanted to see if that was really achievable. A quarter-MOA difference in accuracy potential may seem tiny in practical terms but it will make a difference in competition. In a match, the difference between 3/4-MOA and 1/2-MOA can alter your hit probability on a small target by 20-30%.

The AR platform also lets you tinker with triggers, stock ergonomics and muzzle brakes that help in managing the dynamics of a long distance shot better. Well I found out you can get the incremental accuracy but there’s more work to do to get the same reliability. Being a curious sort, it’s worth it to me to explore it. It’s a far cry from as-issued M-1 shooting with whatever HXP is handy. This is definitely swimming in the deep end of the pool.

Permalink Bullets, Brass, Ammo, Reloading 7 Comments »
April 8th, 2015

Engraved Colt Woodsman — Blued Beauty by J.M. Browning

With today’s plastic-framed Glocks and Keltecs, aesthetics have been sacrificed on the altar of functionality. Not so in the early 20th century — in that period, the best firearm designers created guns that looked as good as they worked. One example is the classic Colt Woodsman. This design came from the legendary John Moses Browning and was later refined by Colt before the pistol’s introduction in 1915. The Colt Woodsman’s frame design evolved over time in three distinct series: Series One 1915–1947, Series Two 1947–1955, and Series Three 1955–1977. Shown below is a stunning Carbonia-blued and engraved Third Series model with ivory grips.

Click Photo to View Larger Image
Accurateshooter.com john moses browning engraved colt woodsmand series three third NRA museum
Photo courtesy NRA Museum

Engraved Colt Woodsman from NRA Museum
In the NRA Museum’s Robert E. Petersen Gallery are many fine engraved arms. This Colt Woodsman .22 pistol is one of the Third Series guns that were made until 1977. Heavy barrels in either 4.5 or 6 inch lengths were offered in this variation. The Museum’s staff says: “We think the poised golden rattlesnake near the serial number is the [best] embellishment without putting down in any way the ivory grip panels or gold outline inlays.”

AccurateShooter NRA Museum Teddy RooseveltYou can see this lovely Colt and countless other fine firearms at the NRA Museum in Fairfax, Virginia. The Museum is open every day from 9:30 am to 5:00 pm, and admission is free.

Now through April 20, 2015, the Museum hosts a Theodore Roosevelt exhibit: “The Trappings of an Icon”. This includes Roosevelt memorabilia on loan from Sagamore Hill National Historic Site.

Permalink Gunsmithing, Handguns No Comments »
April 8th, 2015

Gunsmoke Store Raided in Colorado

Update — Rich Wyatt Arrested for Theft
Rich Wyatt, owner of the Gunsmoke gunshop, was arrested Friday, April 10, 2015. He turned himself into the Jefferson County Sheriff’s office after being charged with felony “theft from at ‘at-risk’ adult”. This charge stemmed from alleged conversion of property from an individual who had consigned guns with Wyatt. According to CBS 4 Denver, “The victim in the case had consigned a rare and antique gun collection with Wyatt in 2013. Repeated efforts by the victim at recovering the weapons had failed.”

READ CBS Story about Rich Wyatt Arrest in Colorado.

Gunsmoke Colorado Wyatt Family Discovery Channel ATF IRS raid FFL

Lesson: Don’t sell firearms if you don’t have a valid Federal Firearms License.

Gunsmoke, the Wheat Ridge, Colorado firearms emporium featured on the Discovery Channel’s reality TV show American Guns, has been raided by the Feds. ATF and IRS agents swooped into the Gunsmoke shop last week, culminating an investigation into alleged improper gun transactions. Firearms were seized from Gunsmoke’s inventory and carted away in federal vans.

Run by Rich Wyatt and his wife Renee, Gunsmoke earned notoriety for Rich’s salesmanship and the revealing clothing worn by his wife and his daughter. The show highlighted Rich’s ability to sell firearms for what were often shockingly high prices. There was one problem though… Wyatt had voluntarily surrended his FFL some time ago. Consequently, Gunsmoke’s firearms transfers were being conducted through a third party. Apparently the Feds did not like the arrangement.

Those who have watched the Wyatts on the Discovery Channel may not be surprised by this outcome. It seemed like Rich Wyatt’s signature talent was selling guns at outrageously inflated prices (if the sales price quoted on the show are to be believed). As for the alleged “gunsmithing” done in the Gunsmoke shop… well it certainly was creative. You could definitely learn what NOT to do to a fine firearm by watching the Gunsmoke TV show.

No arrests have been made. The GunsAmerica Blog reports: “This is not the first time Gunsmoke Guns was investigated by a federal agency. In 2013, the IRS searched the store as part of an ‘ongoing financial investigation.’ So far, no charges have been filed against the owner of the store Rich Wyatt, according to the U.S. Attorney. But local CBS4 investigator Rick Sallinger learned the shop may have been selling guns illegally.”

Permalink - Videos, News 8 Comments »
April 7th, 2015

Make Your Own Modified Case for Hornady O.A.L. Gauge

Hornady Stony Point Tool OAL O.A.L. gauge bullet seating length ogive checker

In this video, Forum member Erik Cortina shows how to create a custom modified case for use with the Hornady Lock-N-Load Overall Length Gauge (formerly the Stoney Point Tool). While Hornady sells modified cases for many standard cartridges, if you shoot a wildcat such as the 6mm Dasher or .284 Shehane, you’ll need to create a custom modified case*. And even if you shoot a standard cartridge such as the .308 Winchester you can get more consistent measurements if you make a custom modified case from a piece of brass fired in your chamber.

The process is straight-forward. Take a piece of brass fired in your chamber and full-length size it (with about .002″ shoulder bump). Then you need to drill out the primer pocket. Erik uses a mini-lathe for the operation, but this general process can be done with a drill press or other tools. Erik shows how to do this with a 0.290″ HSS (High Speed Steel) drill bit on a mini-lathe. After drilling the hole comes the tricky part — you need to tap the case with the precise 5/16″ x 36 threads per inch (tpi) right-hand thread that matches the male thread on the O.A.L. Gauge. This 5/16″ x 36 tpi tap is pretty uncommon, but you can order it from Amazon.com if you can’t source it locally.

Hornady Stony Point Tool OAL O.A.L. gauge bullet seating length ogive checker

If you use a mini-lathe, Erik suggests loosening the tailstock slightly, so it can float while cutting the threads. Erik also says: “Make sure you get the tap on pretty tight — it’s going to want to spin.” Erik turns the case at about 100 rpm when tapping the threads. Once the case and tap are rigged, the actual tapping process (see video at 6:00) takes only a few seconds. While the mini-lathe makes the tapping process go more quickly, the threading can also be done with other systems.

TIP: Don’t just make one modified case, make three. That gives you one for your range kit, one for your home reloading bench, plus a spare (since you WILL eventually lose or misplace one).


Here’s the Stuff You Need

Hornady Stony Point Tool OAL O.A.L. gauge bullet seating length ogive checker

5/16″-36 TPI Threading Tap
The required thread is somewhat uncommon. You need a 5/16″ – 36 tpi Right Hand Thread Tap. If you can’t find it locally, Amazon.com carries the correct tap. Erik notes: “The 5/16-36 tpi tap is not a common size. I think Hornady did this on purpose to make it more difficult for the average guy to make his own modified cases.”

0.290″ Drill Bit
Erik uses an 0.290″ HSS “L” drill bit. (This “L” Letter Gauge code designates a 0.290″ diameter bit). A close metric equivalent would be 7.3 mm (0.286″). Erik says: “A 9/32″ drill will also work but it will be harder to run the tap in since the hole will be .281″ instead of .290″ with the Letter Gauge L bit.”

Tips for Using O.A.L. Gauge with Modified Case
We’ve noticed that many folks have trouble getting reliable, consistent results when they first start using the Hornady O.A.L. Gauge (formerly the Stoney Point Tool). We’ve found this is usually because they don’t seat the modified case properly and because they don’t use a gentle, consistent method of advancing the bullet until it just kisses the lands.

Here is our suggested procedure for use the O.A.L. Gauge. Following this method we can typically make three of four measurements (with the same bullet), all within .001″ to .0015″. (Yes, we always measure multiple times.)

1. Clean your chamber so there is no build-up of carbon, debris, or lube. Pay particular attention to the shoulder area.

2. Screw the modified case on to the O.A.L. Gauge. Make sure it is seated firmly (and doesn’t spin loose). Note, you may have to re-tighten the modified case after insertion in the chamber.

3. Place your selected bullet so that the ogive (max bullet diameter) is behind the case mouth. This prevents the bullet from “snagging” as you insert the tool in the action.

4. Insert the O.A.L. Gauge into your chamber smoothly. Push a little until you feel resistance. IMPORTANT — You need to ensure that the shoulder of the modified case is seated firmly against the front of your chamber. You may have to wiggle and twist the tool slightly. If you do not have the modified case seated all the way in, you will NOT get a valid measurement.

5. Advance the bullet slowly. (NOTE: This is the most important aspect for consistency!). Push the rod of the O.A.L. tool gently towards the chamber. DON’T shove it hard! Easy does it. Stop when you feel resistance.

6. IMPORTANT. After gently pushing on the rod, give the end of the rod a couple forward taps with your finger. If your bullet was slightly skewed, it may have stopped too far back. Adding a couple extra taps will fix that. If the bullet moves after the taps, then again push gently on the rod. NOT too much! You just want to push the bullet until it just “kisses” the lands and then stops. Do NOT jam the bullet into the rifling. If you do that you will never get consistent results from one measurement to the next.

* For a $15.00 fee, Hornady will make a custom modified case for you if you send two fired pieces of brass. Send fired cases and $15.00 check to: Hornady Manufacturing, Attn: Modified Cases, 108 S. Apollo St., Alda, NE 68810. More Info HERE.

Permalink - Videos, Reloading 14 Comments »
April 7th, 2015

Ultimate Varmint Cartridge? WSM Runs 125-grainer at 3975 FPS

Spring has sprung. That means it’s time for varmint hunting to commence in many areas of the country. This “Blast from the Past” story recounts an epic groundhog adventure — the quest to nail a ‘hog at 1000 yards. Learn how Richard Franklin succeeded, using twin 300 WSM rifles he crafted. These bad boys drive 125-grain bullets at 3975 fps. Now THAT’s some serious groundhog-flippin’ firepower.

A few seasons back, Gunsmith Richard Franklin and his shooting partner Roy both achieved a varmint hunter’s dream — nailing a groundhog at 1000+ yards. The guns that did it were two of Richard’s 300 Varminters. These are 300 WSMs that push a 125gr bullet through 32″, 15-twist barrels to achieve velocities approaching 4000 fps. Here is Richard’s report, condensed for the Bulletin.

Richard's Custom Rifles

The 1005-Yard Groundhog Adventure, by Richard Franklin
September 20th found Roy and I on our last groundhog hunt of the year. Bow season for Deer begins Oct. 4th and we wanted time to ready ourselves. Roy had killed 99 hogs so far this year and I had killed 97. In the morning, we headed over to the Overstreet farm leased by our good friend Richard Ruff. We set up the shooting trailer on top of a hill where we had a good view of several brush piles around the pasture. In the first ten minutes Roy put a hog in the air about four feet at 497 yards with his 300 Varminter, giving Roy an even 100 hogs for the year. I shot hogs at 180 yards, 506 yards, and 456 yards. That gave me a total of 100 for the year.

Richard's Custom RiflesThen we decided to go up to Danny’s and Bill’s hard rock dairy farm. We set up on the top of a high hill and shoot over the farm buildings to another mountain where there is a huge pasture with large rock piles. We scanned this pasture for about an hour and a half. Roy has a pair of Zeiss 8-power binocs and I use a pair of the Leica 10-power Geovids with built-in laser rangefinder. I also have a “Big Eyes” set-up — two 22-power Kowa spotting scopes mounted on a bracket and used on a sturdy tripod. After some time searching the field for hogs and seeing none, we decided to pack up and go to a farm owned by Donnie Campbell. Over the years we have shot many a hog here. Roy once shot one here at 905 yards and my longest shot on this farm was 714 yards. Most kills here are made at over 400 yards. There’s a perfect place to shoot hogs from a single firing position. At the back property line was a big hill about 400 feet higher than the surrounding pastures and we could see and shoot about 200 degrees around us all the way out to 1,200 yards.

Setting Up the 1005-yard Shot
I had the first shot and nailed an easy one at about 140 yards. He was thinking he was hidden from view. Wrong! BLAM…POOF. Roy nailed a hog at 469 yards under an old pear tree. Roy nailed another hog at 522 yards by a big log pile where we had killed about ten hogs this summer. Roy was looking through the Big Eyes and called out, “Hey Rich…I got you one way over there on the next farm by the edge of the woods.” I ranged the hog with the Geovids four times, registering 1003, 1007, 1006 and 1005 yards. I decided on the 1005 as the distance. Checking my chart, I clicked up to 18 and 1/4 minutes. We had a very stiff wind blowing left to right. I have a Nightforce 8-32 power scope with the MLR reticle. I held the fourth windage dot and touched one off. I see the bullet strike nearly in line with the hog but low. I click up another minute and a half making a total of 19 3/4 minutes. Roy is watching all this through the Big Eyes and can see better than I can. He confirms where the first bullet strike was. I hold the same windage and touch off another round in my Bat-actioned, 32″, 15-twist Bartlein-barreled 300 Varminter. The hog was standing up for this shot. Through the scope I see the bullet’s vapor trail going straight for the hog. I lost the vapor trail before the bullet got there but I saw the hog flip over.

Hot damn, what a shot! After Roy shakes my hand and slaps me on the back, I walk over to the Big Eyes for a better look. “Roy, there’s another hog trying to fight that dead one,” I say. This hog (evidently both are males) is biting and dragging the dead hog. He is really going at it. Both hogs were evidently eating fallen acorns from the huge White Oak tree at the edge of the woods.

Richard's Custom Rifles

Roy Gets His Chance
I tell Roy, “Get up there on your bench and try that hog, I’ll spot for you.” Roy clicks up to 19 1/2 minutes and holds three feet for windage. Roy lets it go and I see the vapor trail going in on the hog. It hits a foot to the right and low. “Hey Roy”, I say, “click up two more minutes and hold one more foot of wind.” The hog ran in under the tree at the bullet’s impact but was back within 30 seconds. Roy is now clicked up and lets the second round go. I see the vapor trail dropping in on the hog but the bullet impacts dead in line, but still a bit low. “Roy — give it another minute and a half and hold the same wind”. I can hear Roy furiously working the bolt and chambering another round, then POW, and I see the vapor trail again. It looks like it’s gonna be in the middle of the hog but it drops right in under his neck, nearly hitting him. The hog vacates back under the tree for an instant but decides he is winning the fight against the dead hog and comes right back. Roy lets the fourth round go with the same hold as the last shot. I see the vapor trail of the 125 grain Ballistic Tip dropping right in on the hog, catching him perfectly in the shoulder. The live hog flips up and falls on top of the dead hog, his tail coming up stiff as a poker as he flags us that he is instantly dead.

Two 1000+ Yard Hits. A Record for Roy, Near-Record for Richard.
This was Roy’s longest shot ever. His previous record was 905 yards. This was my second longest shot, as I had killed a hog at 1018 yards seven years ago about 40 miles from this spot. I tell Roy that I’m putting up my hog rifle for the year. I’ll let this long shot register in my memory as the last Groundhog kill of 2008. Roy says “That’s fine, I’m gonna do the same.” Hog hunting is officially over for 2008. Now it’s time for Deer.

CLICK HERE to Visit Richard Franklin’s website and learn more about this ‘Hog hunt.

[Editor’s Note: Richard’s rifle has a BAT action and is able to drive the 125 Nosler at about 3975 fps. Roy has a Remington action on his 300 Varminter. The Rem doesn’t take high pressures as well as the BAT, so Roy’s load is down-loaded to about 3825 fps. Roy also uses a “boosted” Leupold rather than a Nightforce. Because of the difference in scopes, and the lower velocity, Roy needed more elevation clicks to reach the 1005-yard distance.]

Permalink Hunting/Varminting 1 Comment »
April 7th, 2015

Big NRA Sweepstakes — 600 Winners — No Cost to Enter

So, are you feelin’ lucky? The NRA is running a big contest right now through June 30, 2015. The NRA’s new Six Shooter Sweepstakes gives you a chance to win scores of valuable prizes. The Grand Prize is your choice of a 25-Gun collection, a Dodge Ram Truck, or a Brown Bear Hunt. There are numerous other prize packages as well. Overall 600 winners will be drawn and the NRA promises: “All prizes must be awarded”.

The NRA’s Six Shooter Sweepstakes is part of an effort to sign up new NRA Members. However, you don’t need to join the NRA to enter the contest, and existing NRA members may enter as well. You do have to supply your name, street address, and email address.

CLICK HERE for CONTEST ENTRY PAGE.


Here’s a list of all the major prizes.

Here’s the Fine Print
NO PURCHASE OR DONATION NECESSARY TO ENTER OR WIN. A PURCHASE OR DONATION WILL NOT IMPROVE YOUR CHANCES OF WINNING. Sweepstakes is open to legal residents of the 50 United States and Washington D.C., age 21 years or older. To qualify for the random drawing, online entries must be received by 11:59 PM ET on 6/30/15. See Official Rules for details. Click HERE for Privacy Policy.

Permalink Hunting/Varminting, News 9 Comments »
April 6th, 2015

FREE Fun Targets from NSSF — Download and Print

Here are four FREE fun targets from the NSSF. These can be downloaded as PDF files for easy, scalable printing. Choose from four fun targets: Orange Clays, Fish in a Barrel, Cans on Fence, or Bacon Xs. To download any of the targets, right click and “Save Link As”. You can also click on the four large targets and they should open up in most browsers if you have the PDF reader installed. Have Fun!

Orange Clays

Fish in a Barrel

Cans on Fence

Bacon Xs

Download FREE Bullseye Targets
The NSSF also offers conventional bullseye-style targets on the NSSF Targets page. Here are two, high-contrast printable targets. With five (5) bullseyes per sheet, these are good for load development. They also work well at short range for pistol shooting.

Permalink Competition, Shooting Skills No Comments »
April 6th, 2015

Shoot Air Guns at NRA Meetings & Exhibits in Nashville

Pyramid Air Rifle NRA Convention Meeting Nashvillee TN

What’s the best part about the NRA Annual Meetings & Exhibits? Well, if you’re a kid (or a kid at heart), the answer is the indoor shooting range. Every year, the first place we visit at the NRA Show is the Air Gun Range operated by Pyramyd Air. There you can try out, for a nominal fee, many different kinds of air pistols and air rifles. It’s fun, and its great to see so many young people learning about marksmanship is a safe, supervised setting. (Photos courtesy Pyramyd Air.)

Pyramid Air Rifle NRA Convention Meeting Nashvillee TN

NRA Pyramid Air Air range NRA Pyramid Air Air range

Arsenal of Air Guns
A host of air guns will be available to shoot under the guidance of qualified instructors. You can get your hands on new models from Air Arms, Air Venturi, AirForce, Beeman, Beretta, Benjamin, Crosman, Remington, Swiss Arms, Stoeger, Umarex USA, and Walther.

Pyramid Air Rifle NRA Convention Meeting Nashvillee TN

One of the rifles at the Air Gun Range, the Stoeger Arms X20S, even has a suppressor.

Pyramid Air Rifle NRA Convention Meeting Nashvillee TN

Pyramid Air-Sponsored Air Gun Range Hours and Location
The “Pyramyd Air” Air Gun range will be located in room 103 in Music City Center. The air gun range will be open the following hours:

Thursday, April 9: 2:00 p.m. – 6:00 p.m.
Friday, April 10: 8:00 a.m. – 6:00 p.m.
Saturday, April 11: 8:00 a.m. – 6:00 p.m.
Sunday, April 12: 9:00 a.m. – 5:00 p.m.

Permalink News 5 Comments »
April 5th, 2015

CMP Games Oklahoma Will Be Held April 8-12, 2015

Oklahoma CMP Games

The 2015 Oklahoma CMP Gameswill be held at the Oklahoma City Gun Club next week, April 8-12, 2015. The popular OK Games will feature clinics, SAFS/M16 match, EIC Rifle Match, GSMM Four-Gun Aggregate, Vintage Sniper Match, CMP As-Issued 1911 Pistol Match, Military & Police Service Pistol Match, EIC Pistol match, and several other events! All events will take place at the OKC Gun Club’s Range in Arcadia. Visit the CMP Website for more details and to register.

CMP Games - Oklahoma

Oklahoma CMP Games Resources

Oklahoma CMP Games

Below, Leon Rutherford, CMP Master Instructor, helps a shooter on the firing line during the CMP Small Arms Firing School. The SAFS teaches safety, positions, how to load and clear the rifle, how to loop a sling and prepare for practice firing. Students are issued AR-15 rifles to use during the school and will fire the M16 EIC Rifle Match.

CMP oklahoma
The young shooter IS wearing eye protection, an all-clear set of plastic glasses.

Permalink Competition 1 Comment »
April 4th, 2015

Muzzle Threading — Don’t Remove Too Much Steel

Our friend Robert Whitley of ARX Enterprises LLC has learned, through careful measurement and testing, that some barrels threaded 5/8″ x 24 tpi at the muzzle may not deliver optimal accuracy. The reason is that the end of the barrel can bell out slightly, like a trombone, because too much steel has been removed. This is particularly true with .30-caliber barrels, but it can also be a problem with smaller caliber barrels (even 6mm). Robert demonstrates this phenomenon in the video below. All gunsmiths, and anyone considering threading a barrel, should watch the video. At 1:00 – 1:30 Robert gauges a 5/8″ x 24-threaded .30-Caliber barrel. You can see the belling effect clear as day.

Barrel Threading AR15 ARX Robert Whitley bartlein

“When setting up a commercial barrel in the lathe, we noticed that the maximum-sized bushing that would fit in the bore at the chamber end was almost .0015” smaller [than what would fit] at the muzzle. That precipitated my pin-gauging of a number of different commercial barrels that were threaded for 5/8” x 24 tpi. What I found is what’s shown on the video.” – R. Whitley

Solve Problem with a Larger Thread Diameter
If 5/8″ x 24 threading is potentially harmful to accuracy, is there a solution? Yes, you simply need to leave a little more steel on the barrel. (See Video starting at 02:40.) Frank Green of Bartlein barrels states: “We get these questions all the time. I say run the largest thread diameter that is possible.” Robert Whitley has found that a 3/4″ x 28 tpi threading does not cause the “belling effect”. Accordingly Robert recommends 3/4″ x 28 if you need to thread your barrel for a muzzle brake or suppressor. Robert explains: “We only make 3/4” x 28 tpi muzzle brakes and that’s what we recommend to customers.”

Barrel Threading AR15 ARX Robert Whitley bartlein

“See how much meatier the 3/4″ threading is vs. the 5/8″. The 3/4″ threading offers a lot more metal around the bore. There’s a lot less opportunity for the bore to become bell-mouthed…” – Robert Whitley

Barrel Threading Diameter — What’s Important to Know
By Robert Whitley
In truth, the 5/8” x 24 tpi threading never came out of any accuracy-based think tank or set-up, it’s a military .30-Cal threading for barrels that someone has to carry around (they needed to keep the barrel weight down so it was smaller in diameter and the threading had to work with that situation). People have somehow assumed because the military uses that threading for certain things that it must mean that it’s also fine for a highly accurate rifle too, but that’s not really correct.

I don’t think there is any better and realistic option than the 3/4” muzzle threading, and we also do it so there is no relief cut behind the threads on the barrel (i.e. put the relief cut on the brake or jam nut, don’t chop down on the muzzle of the barrel). For some reason many have a hard time grasping that the metal at the muzzle end of a rifle is “sacred” and you should not cut it down any more than absolutely necessary. A little threaded pencil diameter nub on the end of a barrel is not ideal for accuracy especially if it’s threaded and you need to torque on it. I cringe when I see a barrel with something like an MTU or Heavy Varmint contour, only to have an itty-bitty pencil thin threaded nub right at the muzzle so someone can “screw on a can” or a muzzle brake.

Lessons Learned Over the Years
A number of years ago I did a 30BR rifle project with Craig Kostyshyn who was big in the 30BR game and he made some of the best 30BR rifle barrels for benchrest competition. When I did the project I wanted a medium-heavy Palma type contour barrel I could use and also have a muzzle turndown for a front sight band. When he found out I was going to have the muzzle turned down he said “whoa, I need to provide for that when I make the barrel because if you turn the front down later you’ll be shooting a trombone” (i.e. the muzzle bore dimension would open up).

What he did was rough contour the barrel with the turndown (about .010” oversize) before he lapped the barrel, then when he lapped the barrel he took it easy in the muzzle area and worked the back of the barrel more. I thought he was a little bit excessive in his concerns but the barrel shot great and I wasn’t going to argue with him, after all he was shooting groups in the ones. I kind of just filed that away and never thought about it until recently when I went to have Fred from Sabreco do some chamber re-work on a commercial .30-caliber barrel I had. When setting up the barrel in the lathe and indicating things Fred noticed that the maximum-sized bushing that would fit in the bore at the chamber end was almost .0015” smaller [than what would fit] at the muzzle and he mentioned it to me. That precipitated my pin- gauging of a number of different commercial barrels I had that were threaded for 5/8” x 24 tpi. What I found is what’s shown on the video.

NOTE: This is a copyrighted article. Do not reproduce or re-link more than 75 words without written permission from AccurateShooter.com.

Permalink - Videos, Gunsmithing 13 Comments »
April 4th, 2015

Registration Opens for 2015 CMP Events at Camp Perry

National Matches Camp Perry CMPThinking about going to Camp Perry this year? Well registration has opened for the 2015 CMP National Pistol and Rifle Matches. The National Matches at Camp Perry include the CMP National Trophy Rifle and Pistol Matches, the Pistol and Rifle Small Arms Firing Schools, CMP Games rifle events, and the NRA National Pistol, Smallbore Rifle, and High Power Rifle Championships. These matches are conducted jointly by the CMP, NRA, and the Ohio National Guard. Here are registration links for the CMP Trophy events for High Power Rifle, Rimfire Rifle, and Pistol. Note: You will have to register separately for the NRA Events.

2015 Nat’l Trophy Rifle Matches
(Online Registration)
Printable Rifle Entry Form

2015 Nat’l Rimfire Sporter Match
(Online Registration)
Printable Rimfire Entry Form

2015 Nat’l Trophy Pistol Matches
(Online Registration)
Printable Pistol Entry Form


2015 National Match Calendar

CLICK HERE to View/Download Calendar as Larger PDF File

CMP NRA National Match Calendar 2014 2015 Camp Perry Ohio

Simply click on the Calendar and it will zoom into a full-size PDF for easy viewing.
You can also download the PDF for printing.

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