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February 21st, 2017

Scrambling Eggs at 616 Yards with 6mmBRX

6mm BRX egg shoot

Can you hit an egg at 600+ yards? We mean hit it reliably — not just by luck. To do that you’ll need good shooting skills and a very accurate rifle. How accurate? Well, a chicken egg is, on average, 2 1/4 inches (57 mm) long and 1 3/4 inches (44.5 mm) in diameter. That means to hit an egg (on demand) at 600 yards, you’ll need a rifle capable of 1/3-MOA accuracy (or better). Forum member DukeDuke has such a gun, and he demonstrated its egg-busting prowess in this short video. DukeDuke’s rifle is chambered in 6BRX (a 30° 6BR Improved) and it’s loaded with DTAC 115gr bullets pushed by Alliant Reloder 17. In the video, the eggs are placed on top of poles set 616 yards from the firing line.

See Egg Hit at 38 second mark…

As you can see in the video, that’s a heck of a nice shooting range where DukeDuke scrambled those eggs at 616 yards. The range is situated just outside of Lake Jackson, Texas. As for the gun… the action is a Rem 700 SA BDL, blueprinted and bedded in a Rem/HS Precision PSS stock. The 31″ barrel is 1:8″-twist Broughton. The “P3″ on the barrel stands for Porter’s Precision Products, Lake Jackson, TX. The rifle was built by Kenneth Porter. The load was 33.5 grains of RL-17 at 2950 fps, with 115gr DTAC bullets touching the lands. Cartridge OAL is 2.400″.

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May 24th, 2014

IBS Match Report: 600-Yard Match at Piedmont

IBS Piedmont 600-yard match

Report by Jaime Hammer, IBS Social Media Manager
On Saturday, May 10, 2014, Piedmont Gun Club in Rutherfordton, NC (located near the Chimney Rock and Lake Lure area) held a 600-yard benchrest match. Weather conditions could not have been better. The air was cool, the sky was overcast, and there was very little wind. It rained for about thirty minutes in the morning, but that didn’t interfere with shooting, and the remainder of the day was dry. The match began at 9:00 AM with the Light Gun (LG) class, and the Heavy gun (HG) class shot in the afternoon. Thirty-three competitors (including many of the nation’s top 600-yard shooters) attended the event.

IBS Piedmont 600-yard match

Dominant Performance by Paul Isenhour
Paul Isenhour took home first place prizes for LG score, LG group, and HG group. He potentially set a new Two-Gun Group Size Aggregate record (the current record is 1.7797″ by Mike Hanes). In the LG class, Paul’s score total was 195 points, and his group size Agg was 1.708″. In HG class, Paul’s score total was 180, and his group size Agg was 1.769″.

In Light Gun class Paul was on fire right out of the gate — he shot a stunning 1.130″ (50-2X) on the first Light Gun target, followed by a superb 1.330″ (50) on the second LG target. That’s right, Paul shot two, 50-point, sub-1.5″ groups back to back. That is truly spectacular shooting. And Paul was quick to credit the stock-maker (Paul made the handsome stock himself). Paul’s 6mm Dasher features a Stiller Viper action, Bartlein barrel, and Leupold 45X scope. He was running Berger 105g Hybrid bullets pushed by Varget powder and Federal primers.

IBS Piedmont 600-yard match

Paul Isenhour was on fire in Light Gun! Back to back, he shot a 1.130″ with 50 points, followed by a 1.330″, again with 50 points. That is astounding accuracy!

In the LG class (score), Larry Wheeler came in second place with a score of 193. Reggie Wilson came in third place, with a score of 192. In the LG class (group), Reggie Wilson came in second place with a score of 1.861. Chad Jenkins came in third place with a score of 2.000. In the HG class (score), Chris Childers came in first place with a score of 197. Mike Hanes came in second place with a score of 193. Richard DeSimone came in third place with a score of 190. Finally, in the HG class (group), Richard DeSimone came in second place with a score of 1.917. Jeff Godfrey came in third place with a score of 2.217. Top shooters received beautiful plaques for their great shooting. All winners and shooters competed with outstanding skill and sportsmanship.

Download Piedmont 600-Yard Full Results .XLSX | (Download smaller XLS Version)
Download Piedmont 600-Yard Equipment List .XLSX | (Download smaller XLS Version)

IBS Piedmont 600-yard match
Chad Jenkins, Jeff Godfrey, Paul Isenhour, Mike Hanes, Rich DeSimone, Reggie Wilson, Chris Childers.

IBS Piedmont 600-yard match

Piedmont Gun Club has been the host club to several record-setters, three of whom (Rodney Wagner, Mike Hanes, and Chad Jenkins) attended this match. Rodney, Mike, and Chad set their records in May and July of 2013 for Group, Score, Group Aggregate, and Score Aggregate in Light Gun class, respectively. Rodney shot a spectacular 0.336″ group at Piedmont last year. An IBS Light Gun record, that was the smallest 600-yard group in history — the smallest 5-shot group ever shot at 600 yards by anyone, anywhere, in any type of shooting match. Initially measured at 0.349″, Rodney’s record group was certified at 0.336″. That is a record for the ages.

Table-Top Rifle-Cleaning Cradles

Among the interesting gear on display at Piedmont were a variety of hand-made cleaning cradles designed to fit on table tops. These typically employ a box-style design, with layer of cloth or other padding to cushion the underside of the stock. On display were both single-rifle cleaning cradle/boxes and dual-rifle rigs. This is a good do-it-yourself project that can be built with simple tools.

Click Photos to View Large Versions
IBS Piedmont 600-yard match

Notice that these cradle-boxes feature an extended lower section in the rear. This lower “lip” butts up against the edge of the table so the whole assembly stays in place. In the photo above it appears that the lower section may actually be cut from a rubber block, but we’re not sure.

IBS Piedmont 600-yard match

IBS Piedmont 600-yard match

Piedmont Runs a Great Show
Everyone at the match was extremely welcoming, friendly, and helpful. As a rookie, I found that other shooters were quick to answer any questions I had regarding shooting, reloading, the match, or the club. Rookie shooter Paul Hammer said, “The shoots at Piedmont Gun Club are always well-run and organized. Everyone is nice and willing to help new shooters.” You don’t have to win a trophy to have a great time. One shooter observed that he doesn’t really pay much attention to his score — he attends matches to have fun and socialize.

IBS Piedmont 600-yard match
Check out this nice bench set-up with an angled ammo caddy, custom “back-stop” for ejected brass, and a big, stable “gator”-style rear sandbag. If you look carefully, you’ll see another sandbag positioned just to the right side of the butt-plate. This bag helps support the shooter’s forearm for his trigger hand.

If you are interested in shooting at Piedmont, a schedule of events can be found by selecting the “Schedule” tab at the top of the website. Match registration is held at the beginning of each event. You can join the Piedmont Gun Club by logging in to Click the “About” tab at the top of the Home Page, select “Member Application”, and print that form. Once you’ve filled the form out, mail it to the address supplied on the application.

All shooters, myself included, are very appreciative of Piedmont Gun Club for hosting such a smoothly running match, where the level of camaraderie among shooters is very high. The quality of the facilities, experience in organizing events, and helpfulness of participants all came together to create a prime environment for benchrest rifle shooting.

IBS Piedmont 600-yard match
Here’s a handsome Light Gun with an Obeche “Indian Paint” laminated Shehane Tracker stock. Click the photo to see a larger full-screen version showing the whole rifle.

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December 6th, 2012

Forum Member Shoots 200-26X at 600-Yard Prone Match

At a recent 600-yard High Power prone match in Florida, Forum member Frank Diaz shot a spectacular 200-26X score. He was firing his 6 BRX rifle with sling and scope in the Any Sights/Any Rifle category at the Port Malabar Rifle & Pistol Club. This is a remarkable accomplishment — we have never heard of a higher ‘Any/Any’ score shot at this distance on a 20-round stage with sling support. How do you score twenty-six Xs in a 20-shot match, you may ask? The answer is that, under the NRA rules, a competitor who shoots a perfect score (all 10s in X-Ring for his record shots), can continue to fire until he eventually places a shot outside the X-Ring. So Frank hit 26 Xs in a row. Wow.

Frank reports: “I shot a 200-26X at Port Malabar, FL at 600 yards using sling and scope. The wind was light, moving from Northeast to East at 5 to 10 mph. The gun was a 6mm BRX with 32.8 grains of Varget. My gun features a Barnard action, Brux barrel chambered by Paul Larson, and an H&H prone stock with work done by Alex Sitman (MasterClass Stocks). I [sometimes] shoot this gun with irons but for this match I mounted a Nightforce 12-42″.

Port Malabar Rifle & Pistol ClubThe Port Malabar Rifle & Pistol Club operates the last civilian competition 600-yard rifle range left in Florida. With 122 acres and a dozen ranges, Port Malabar is the largest self-policed shooting club in the state. While the 600-yard range is not open to the public, there are numerous organized events open to shooters from other clubs and locations. The range is located at: 610 Hurley Blvd. SW, Palm Bay, FL 32904.

Port Malabar Rifle & Pistol Club
P.O. Box 060307
Palm Bay Florida, 32906
(321) 956-8300

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August 26th, 2012

Myth Busters II – Bob Crone’s 6mm BRX – by Robert Whitley

by Robert Whitley
6mm BRX Bob Crone Myth BustingAfter Accurate Shooter published the July 31, 2010 Daily Bulletin feature on 6mm BRX Myth-Busting With Bob Crone, further research reveals that there’s more to tell about the BRX, its origins, and its original specifications.

6 BRX Myth-Busters Follow-Up Challenge
I wanted to obtain a print reflecting the true original dimensions of Bob Crone’s 6mm BRX reamer. I hoped to verify the head spacing of the reamer to be .100″ longer than a 6mm BR, and I also wanted to see how Bob’s original print compares to 6mm BRX match reamers currently considered to be the “standard in the industry”.

Recreating the Original 6mm BRX Reamer Print
Clymer Precision was contacted to obtain a print of Bob’s original reamer. Todd Wilms, the current owner of Clymer Precision (and a heck of a nice guy as well) went back in the Clymer archives and pulled the records of the dimensions of Bob Crone’s 6mm BRX reamer. Todd then entered them into Clymer’s current reamer drawing program and has generated a current drawing reflecting the original 6mm BRX reamer. The print (see below) confirms the head space of the 6mm BRX to be .100″ longer than a 6mm BR (i.e. 1.267″ min at a shoulder datum diameter of .350″).

Comments on Bob’s 1996 Clymer Reamer

In many ways, the print dimensions are very close to what is currently recognized as the “standard in the industry” for 6mm BRX reamers, however in other ways there have been some definite changes:

A. Body Diameter: A chamber body diameter of .470″ is still in wide use today with 6mm BRX reamers (that’s measured .200″ forward of the bolt face). The current Lapua 6mm BR brass has a web diameter very close to this diameter and one should be wary of trying to tighten this dimension. If anything, running a little looser (like the .4708″ dimension similar to that used with the 6mm Dasher) would not hurt the performance of the 6mm BRX cartridge a bit.

B. Shoulder Diameter: Bob’s original reamer had a shoulder diameter of .4609″ (the same as a 6mm BR Norma), however many current 6mm BRX reamers now use a .460″ shoulder diameter which helps avoid overworking the brass there if readily available commercial dies are used.

C. Max Chamber Length: Bob’s original print had a “max chamber length” of 1.570″ (the same as a 6mm BR Norma), however many of the current 6mm BRX reamers have shortened this up a little. This is because, when 6mm BR brass is fire-formed into 6mm BRX brass, typically the brass shortens. Indeed, this author’s 6mm BR brass shrinks in OAL from around 1.555″ to around 1.547″ when it is fire-formed to 6mm BRX brass. A max chamber length in the range of 1.560″ – 1.565″ is seen often with 6mm BRX reamers these days.

D. Neck Diameter: While Bob’s reamer has a .262″ neck, this has for the most part given way to either a .269″ (sometimes .268″) turned neck, or a .272″ (sometimes .271″) no-turn neck, with the neck diameter typically selected based on the actual dimensions of the brass to be used.

E. Throat Angle: Bob’s throat angle was one and a half degrees, which seems to be standard and in wide use today with the 6mm BRX.

F. Freebore: Bob’s freebore length was 0.00″ because his smith used a separate throater to set the throat length Bob wanted for specific bullets. These days, a built-in freebore in the range of .104″ – .125″ seems to be very common with 6mm BRX reamers. Freebore in that range is seen by many as a good choice for the readily available 105- to 108-grain 6mm bullets.

Clymer 6BRX Reamer Print

6mm BRX — Real World Specs
Here are measurements on Robert Whitley’s 6mm BRX brass, as fire-formed, full-length sized and ready to load in a no-turn chamber.

Base to shoulder = 1.170″
Base to neck/shoulder junction = 1.333″
Overall case length (fired 2x and re-sized 2x) = 1.547″
Shoulder diameter (resized) = .459″
Diameter .200″ forward of base (resized) = .470″
Neck diameter loaded = .269″

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June 7th, 2011

The 6mm BRX — Myth-Busting with Bob Crone

Bob Crone 6mm BRXDispelling Some 6mm BRX Myths, by Robert Whitley
I recently had an interesting and fact-filled conversation with Bob Crone (the inventor of the 6mm BRX) about his BRX. Bob actually called me because he was concerned that there are a lot of myths and about his 6mm BRX and he wanted to “set the record straight” on a few things. Here’s my summary of some topics we discussed:

Myth One: Bob made his 6mm BRX chamber by running a 6mm BR reamer in too deep.

Truth: There is no truth to Myth One. Bob said he specifically designed the BRX reamer and had it made with the head space he specified and a neck length appropriate for his newly designed 6mm BRX wildcat cartridge.

Myth Two: In the course of making up his 6mm BRX, Bob had a version with a .120″ longer head space than a 6mm BR Norma.

Bob Crone 6mm BRXTruth: Bob was clear that his original design for the 6mm BRX always had a .100″ longer head space than a 6mm BR and that he never deviated from that. Right after Bob started working with his 6mm BRX, Bill Shehane came forward with a 6mm BRX version he made up that had a .120″ longer head space, and thus the confusion started. In truth, the original 6mm BRX always was (and still is) a chambering with a head space .100″ longer than a 6mm BR Norma.

Myth Three: The BRX was originally set up for 105-107gr bullets.

Truth: Bob said he set up his original reamer with a zero freebore and he has his gunsmith use a throater to throat whatever chamber was being made to where he wanted a particular bullet to touch the lands. Bob said he originally started with a 1:10″ twist barrel and shot a bunch of the 95gr VLDs and also 87gr bullets. Later he used an 8.5″ twist barrel for the heavier bullets.

Myth Four: The original BRX was set up also for use with Remington BR Brass.

Truth: Bob said he always used Lapua brass. He originally was an avid reader of Precision Shooting magazine and saw that the .262″ neck-turn neck was working real well with the 6 PPC and 6mm BR bench rest shooters and he decided to try to go with something that was already working well for 6mm shooters. He says his original reamer had a .262″ neck, but he also has a .272″ “no-neck-turn” version that he used on some of his rifles. He said the Lapua brass was so good and consistent, that for some rifles he just “didn’t want to mess with it” so he went with the “no-neck-turn” .272″ neck too.

Bob Crone 6mm BRXMyth Five: The “false shoulder” method was used to make brass.

Truth: Bob said he never used the “false shoulder” method to make 6mm BRX brass, he just loaded 6mm BR brass with a bullet well into the lands of the BRX chamber and fire-formed brass that way. He noted that the accuracy with some of the fire-forming rounds was “outrageous” (i.e. outrageously good that is), so much so, they were shot in matches sometimes.

Myth Six: The 6mm BRX has a blown-out or straightened out body.

Truth: Bob said he kept the basic body taper of the 6mm BR cartridge. He wanted the cartridge to be an easy and inexpensive (but high performance) 6mm wildcat, and the original design was (and still is) set up to use readily available 6mm BR dies (up off the shell holder about .100″ from the normal position).

Author’s note: It was a most enjoyable experience to talk to Bob Crone. He is not only still passionate about his 6mm BRX, but he has a commanding knowledge of it as well.

6mm BRX reamer print, Whitley

Reamer Print provided by AR-X Enterprises LLC,

Permalink Bullets, Brass, Ammo, Reloading 7 Comments »
May 4th, 2011

Whitley Offers 6mmBRX Redding Sizing and Seating Dies

The 6mmBRX (6BRX) is an outstanding cartridge that has set world records and harvested many trophies. Just last week Peter White used his 6BRX to win the NBRSA 600-yard Nationals convincingly. Peter loves his 6BRX, but he has one gripe — he must use two different dies to size his cases because a standard 6mmBR die won’t reach down far enough. White uses a .308 Win or .243 Win die to size the bottom of his 6BRX case then finishes up with his 6mmBR FL bushing die.

Redding 6BRX Dies Available Soon
Now 6BRX shooters have a single-step solution — Redding 6BRX dies. Robert Whitley has commissioned a special run of Redding 6BRX dies. Robert will offer a Redding Type ‘S’ full-length sizing die that will size the whole case, with bushing control over the neck. What’s more, Redding 6BRX micrometer-top Comp Seaters will also be available. Robert, who runs, expects these special-order Redding 6BRX dies to arrive within a few weeks. This is a very limited run of 6BRX dies, and Redding is not currently selling them through other sources. So if you want a Redding 6BRX Type ‘S’ FL sizer or Comp Seater die, you’d better contact Robert soon. Order through:

AR-X Enterprises, LLC (Attn: Robert Whitley)
Phone: (215) 348-8789
Email: rcw3 [at]

6BRX Cartridge Basics
The 6BRX is a modified version of the 6mmBR Norma case. The 6BRX has the shoulder blown forward about 0.100″, but it retains the same 30° shoulder angle of the parent case, and the same sidewall angle. You can use “normal” 6mmBR dies for the 6BRX — that’s one of its appealing factors — but the 6mmBR full-length sizer will miss part of the bottom of the case down near the web.

To compensate for this, many 6BRX shooters full-length size their brass first with a .308 Win or .243 Win FL Die, and then switch to a 6BR die. That system works, but it creates unnecessary steps. With a dedicated 6BRX sizing die, you can size the whole case in one pass, so you don’t need to use two dies. The $89.95 Redding Type ‘S’ Full-length bushing die sold by Whitley is one-die sizing solution that works. Whitley will also offer a package of the 6BRX Type ‘S’ FL sizing die plus a Redding Comp Seater for $199.95. That gives you a complete set of dies for your 6BRX wildcat.

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April 22nd, 2010

6mm Dasher Load Tuning — Tips from Robert Hoppe

The 6mm Dasher is based on the 6mm BR cartridge with the shoulder blown forward about 0.100″ and “improved” to 40°. Case capacity is raised to about 41.0 grains. This allows the Dasher to drive 105-108gr bullets comfortably at 2970-3000 fps without over-stressing the brass. A popular load used by many successful Dasher shooters is 33.3 grains of Reloder 15, CCI 450 primers, with 105gr Berger VLDs, .010″ in the lands. This is a “warm load” and should only be used with fire-formed brass. As with any load, start 10% low and work up. You may also have good luck jumping the bullets .020″ or more.

Robert Hoppe, one of the top 600-yard shooters in the country, was the 2009 NBRSA 600-yard champion. In 2007, shooting a 6 Dasher, Robert nailed a 0.5823″, 5-shot group. At the time it was the smallest group ever shot in 600-yard registered benchrest competition. In 2008, John Lewis shot even smaller with an IBS Heavy Gun, but Robert’s 0.5823″ still remains the NBRSA 600-yard record, and we believe it is the smallest group ever shot at 600 (in registered BR competition) by a 17-lb class rifle. Robert has been very successful in the 600-yard game, and is one of the best 600-yard shooters in the West. He knows how to wring the best accuracy out of the 6mm Dasher cartridge. Here Robert offers some tips on load development and tuning for the 6mm Dasher.

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April 19th, 2009

B.R.A.T. Offers 6BR and 6BRX Uppers for AR High Power Shooters

BR Armament Technologies (B.R.A.T.) of Saluda, VA is currently producing AR uppers chambered for the 6BR and 6BRX cartridges. Unlike some other previous AR conversions for the 6BR cartridge, the BR15 uppers produced by B.R.A.T. do not merely use a .223-sized bolt opened up to fit the .308-sized rim of the 6BR case. Instead B.R.A.T. employs a different bolt design that is bigger, and significantly stronger in the lug area. Shown below is a .223-sized bolt (left) and a BR15 bolt from B.R.A.T. on the right.

6mmBR AR15 rifle

The B.R.A.T. BR15 upper receiver has been specifically designed to use the 6BR family of cartridges. It has a larger bolt, modified bolt carrier, modified upper receiver, larger barrel extension, and most importantly an all-new magazine designed specifically to handle the BR class of cartridges. All other parts are standard AR15. The folks at B.R.A.T. have developed their own magazines. These are 5-round center-feed dual column magazines that work with the 6BR, 6BR-derived cases (like 22 BR), and the 6BRX. Since the round feeds from the center, the mags can also be used for single-feeding.

B.R.A.T. is operated by two long-time competition shooters, both High Power High Masters, both Distinguished Riflemen, and both former captains of the U.S. Air Force Shooting team. President Eric Bellows has placed in the top 10 in the NTI and Presidents matches many times. Eric is former VT State Champion. Bill Walter, Chief Development Engineer, is former FL State Champion, Eliah Root team member, and is current military Palma Match record holder.

NOTE: We have not used or tested a B.R.A.T. upper or magazine. We are just passing on this information at the request of readers. You will find more product specs, and comparitive ballistics, on the B.R.A.T. website. Currently BRAT-15 uppers retail for $1390 with a Douglas barrel or $1550 with a Krieger barrel, chambered either as 6BR or as 6BRX. For another $100, B.R.A.T. offers uppers chambered in 22 BR, 6.5 BR, or 7mm BR. For more info, email 6BRrifles [at], or call (804) 824-7248.

6mmBR AR15 rifle

B.R.A.T. 6BRX Upper Receiver with 28″ barrel and RPA Tall Boy sight

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