In our Shooters’ Forum, one member recently asked: “What makes an AR accurate? What parts on an AR can really affect accuracy — such as free-floating handguards, barrels, bolts, bolt carriers?” He wanted an honest, well-informed answer, not just sales pitches. Robert Whitley posted a very comprehensive answer to this question, based on his experience building and testing dozens of AR-platform rifles. Robert runs AR-X Enterprises, which produces match-grade uppers for High Power competitors, tactical shooters, and varminters.
Building an Accurate AR — What is Most Important
by Robert Whitley
There are a lot of things that can be done to an AR to enhance consistent accuracy, and I use the words “consistent accuracy” because consistency is a part of it (i.e. plenty of guns will give a couple great 5-shot groups, but won’t do a very good 10- or 20-shot groups, and some guns will shoot great one day and not so good on others).
Here are 14 key things we think are important to accuracy.
1. Great Barrel: You’ll want a premium match-grade barrel, well-machined with a good crown and a match-type chambering, true to the bore and well cut. The extension threads must also be cut true to the bore, with everything true and in proper alignment.
2. Rigid Upper: A rigid, heavy-walled upper receiver aids accuracy. The typical AR upper receiver was made for a lightweight carry rifle and they stripped all the metal they could off it to make it light to carry (which is advantageous for the military). The net result are upper receivers that are so thin you can flex them with your bare hands. These flexible uppers are “strong enough” for general use, but they are not ideal for accuracy. Accuracy improves with a more rigid upper receiver.
Some folks think you need a new (or nearly-new) barrel to win a benchrest match. That may be true in the centerfire game, but in the world of rimfire benchrest, things are different. Good barrels can remain accurate for a long, long time. That was demonstrated by our friend Joe Friedrich who recently set a new ARA 4-target Aggregate record. Joe was shooting his trusty old “Sweet Pea” rifle with a very well-worn barrel. In fact, Joe’s record-setting Benchmark barrel has logged well over 100,000 rounds. That’s right, a barrel with over 100K rounds shot the best 4-target ARA Agg ever. Will wonders never cease…
In this video, Joe talks about his rifle, the amazing longevity of his Benchmark barrel, and the ELEY ammo he used to shoot two 2500s on the same day (with a 2475 average for four targets):
Report by Boyd Allen
This pistol belongs to Dan Lutke, a Bay Area benchrest shooter who publishes the results for the Visalia matches to the competitors and the NBRSA. He has been an enthusiastic competitor for an number of years, at various ranges, notably Visalia and Sacramento. The action is a Remington XP-100, to which a Kelbly 2 oz. trigger has been fitted. On top is an old Japanese-made Tasco 36X scope (these were actually pretty darn good). The Hart barrel (a cast-off from Dan’s Unlimited rail gun) was shortened and re-chambered for the 6x45mm, a wildcat made by necking-up the .223 Remington parent case. The custom stock/chassis was CNC-machined by Joe Updike from 6061 Billet Aluminum to fit the XP-100 action and mount a target-style AR grip with bottom hand rest. The gun was bedded and assembled by Mel Iwatsubu. In his XP-100 pistol, Dan shoots 65gr custom boat-tails with Benchmark powder.
TEN Shots in 0.303″ (0.289 MOA) at 100 Yards
How does Dan’s XP-100 pistol shoot? Look at that target showing TEN shots at 100 yards, with eight (8) shots in the main cluster at the top. The ten-shot group measures .303″ (0.289 MOA), as calculated with OnTarget Software. Not bad for a handgun! What do you think, can your best-shooting rifle match the 10-shot accuracy of this XP-100 pistol?
This diagram shows the most common 6x45mm wildcat, which is a necked-up version of the .223 Remington parent cartridge. NOTE: The dimensions for Dan Lutke’s benchrest version of this cartridge may be slightly different.
ACAD drawing by Peter Gnanapragasam CC by SA 3.0, via Wikimedia Commons. Title Added.
Story tip from Boyd Allen. We welcome reader submissions.
Over the years, many different concentricity tools have been on the market. Various approaches have been taken to straightening rounds that exhibit poor concentricity. With extreme examples of excessive run-out, the bullet is is visibly crooked in the neck with the bullet tip clearly off-center. That’s never a good thing. Straight ammo shoots better.
Straighten-Up and Fly Right
If you could straighten up crooked rounds, accuracy should be improved. In the past, some tools promised more than they delivered. But now Bill Goad, a record-setting benchrest shooter, has invented a new tool that improves concentricity via an impact or “jarring” method. A vertical rod with a curved face mates with the case-neck. You spin the case to find the “high spot” of max eccentricity. Then just tap the rod a couple of times and the neck comes back onto centerline. You can then confirm the concentricity improvement with the dial indicator. Watch the video to see how this is done. Pay particular attention to times 01:25 to 01:45. The case starts at .004″ run-out (01:32). After correction (01:40) the neck shows less than .001″ (one-thousandth) run-out.
Benchrest ace Bill Goad demonstrates his innovative Fli-Right Concentricity gauge tool. It works differently than other concentricity enhancers on the market.
Bill Goad knows something about accuracy. He shot a 10-target 100/200 benchrest Combined Aggregate of 0.178″ (see video at 00:15-00:35). Bill Goad’s tool offers advantages over systems that clamp a cartridge at both ends and try to bend the case or tilt the bullet without straightening the neck. Goad’s new Fli-Right tool is available now from PremierAccuracy.com.
Report by Boyd Allen
This pistol belongs to Dan Lutke, a Bay Area benchrest shooter who publishes the results for the Visalia matches to the competitors and the NBRSA. He has been an enthusiastic competitor for an number of years, at various ranges, notably Visalia and Sacramento. The action is a Remington XP-100, to which a Kelbly 2 oz. trigger has been fitted. On top is an old Japanese-made Tasco 36X scope (these were actually pretty darn good). The Hart barrel (a cast-off from Dan’s Unlimited rail gun) was shortened and re-chambered for the 6x45mm, a wildcat made by necking-up the .223 Remington parent case. The custom stock/chassis was CNC-machined by Joe Updike from 6061 Billet Aluminum to fit the XP-100 action and mount a target-style AR grip with bottom hand rest. The gun was bedded and assembled by Mel Iwatsubu. In his XP-100 pistol, Dan shoots 65gr custom boat-tails with Benchmark powder.
TEN Shots in 0.303″ at 100 Yards
How does Dan’s XP-100 pistol shoot? Look at that target showing TEN shots at 100 yards, with eight (8) shots in the main cluster at the top. The ten-shot group measures .303″ (0.289 MOA), as calculated with OnTarget Software. Not bad for a handgun! What do you think, can your best-shooting rifle match the 10-shot accuracy of this XP-100 pistol?
This diagram shows the most common 6x45mm wildcat, which is a necked-up version of the .223 Remington parent cartridge. NOTE: The dimensions for Dan Lutke’s benchrest version of this cartridge may be slightly different.
ACAD drawing by Peter Gnanapragasam CC by SA 3.0, via Wikimedia Commons. Title Added.
Story tip from Boyd Allen. We welcome reader submissions.
Match Report by Mike Wallace for the IBS, with photos by Hillary Martinez and Dean Breeden. This is the first in a series of in-depth match reports published jointly by the IBS and Accurateshooter.com.
The Bridgeville Rifle and Pistol Club (Bridgeville, DE) held 600-yard IBS matches on March 16 and 17 — a separate match on each day. These two matches were the final competitions counting towards Bridgeville’s 600-yard Shooter of the Year honors. Turn-out was strong, with 21 Light Gun (LG), 17 Heavy Gun (HG), and 1 Factory Class competitors. On Day 1, weather (for Bridgeville) was good, with temperatures as high as 54° F, winds less than gale force, periods of overcast and bright sun. On the 17th the shooters braved more challenging conditions. Temps ranged from the low 30s to as high as 40 degrees, with more wind than the previous day and snow flurries in the afternoon.
Topping the podium on March 16th for the Two-Gun Aggregate were Dewey Hancock (1st), Roy Hunter (2nd), and Craig Rowe (3rd). Top performers by Class were Dewey Hancock (2.3855 HG Group), Carey Lamb (196-2X, HG Score), Craig Rowe (2.2703 LG Group), Michael Wallace (189-2X, LG Score), and Robert Jones (4.9845, Factory Group; 172-2X Factory Score).
On March 17th, Craig Rowe, Roy Hunter, and Dewey Hancock finished first, second, and third respectively in the Two-Gun Agg. Class Winners were Jerry Ware (2.7213, HG Group), Roy Hunter (189-3X, HG Score), Dewey Hancock (2.1359, LG Group), and Craig Rowe (188-1X, LG Score). Robert Jones again won for group (6.9494) and score (159-0x) in the Factory Class.
Shooters L to R Craig Rowe, Roy Hunter, Dewey Hancock.
Competition is very keen at Bridgeville. Richard Timmons, Match Director, said, “It can be challenging….it can cause you to talk to yourself!” Rookies and those interested in taking up the sport are gladly welcomed and mentored. When asked his advice for new shooters in the sport, Richard said, “Factory Class is the best place to start for beginning shooters. There are some good factory guns out there that will shoot 600 yards.”
The Bridgeville matches showcased a bright, young talent. 12-year-old Kevin Donalds Jr., the youngest competitor at the two-day event, is already a shooter to be reckoned with — Kevin placed 2nd in Light Gun Group (2.5343) at the March 17th Match. Woe unto many of us later because Kevin plans on staying in the sport a long time!
Like Father, like Son… Kevin Donalds Sr. and Kevin Donalds Jr.
At this match, Bridgeville honored its 600-yard Shooters of the Year (SOY). Earning hard-fought SOY honors were the following shooters (listed 1st, 2nd and 3rd place for each Class).
Bridgeville Rifle & Pistol Club 600-Yard Shooters of the Year
Heavy Gun
1. Roy Hunter
2. Dewey Hancock
3. Bobby Mallory
Factory Class
1. Robert Jones
2. Terry Balding
3. Charles Thuet
Two-Gun
1. Dewey Hancock
2. Roy Hunter
3. Craig Rowe
Shooting at Bridgeville is Fun and Challenging Dewey Hancock is a rookie in his second year in the sport and is making a mark as you can see from match results and Shooter of the Year standings at Bridgeville R&P Club. He advises, “Good bench handling, good equipment, a good gunsmith, and good loading practice — these things will make you shoot with the good guys. You want to stay consistent in this game and that will eventually get you some wins.” When asked who his biggest competitor is, he smiled and said, “The wind!”, but then slipped in Roy Hunter’s name for 600 yards and Dean Breeden for the short range game. Dewey also stated what many of us in the sport know – “It is fun and the whole family can do it.”
Craig Rowe, in the sport for seven years shooting 600 yards and Score, said: “Bridgeville is a great place to shoot – great people – great food – and lots of great competition.” Craig cautions: “Don’t think you’re going to come here, walk in and steal the show, because there are a lot of good shooters.”
About the Bridgeville Club
The Bridgeville Rifle & Pistol Club, Ltd. was established over 50 years ago. The primary activity was NRA High Power Rifle competition at 200, 300 and 600 yards. There are 12 firing points on the High Power range. The Club recently opened its 1000-yard range, which also has firing points at 800 and 900 yards and is used for NRA Long Range Competition (Conventional, Fullbore, Palma, and F-Class) and IBS matches. The Club also has a multi-purpose range with a covered, concrete firing line with 15 benches and impact areas at 100, 200 and 300 yards. A pistol range has covered, concrete firing points and backstops at 25 and 50 yards. Another pistol range is open with five shooting lanes. This range is used for IDPA-style shooting, SASS (Cowboy Action) and Action Pistol. One 600-yard HG Score record has been set by Hal Drake at Bridgeville. For more information, visit www.Bville-rifle-pistol.org.
Are factory rifles really more accurate than ever? This question is examined in the December issue of SHOT Business. In this issue you’ll also find a good discussion of modern bullet design. In his article Whatever Happened to Bad Bullets?, author David E. Petzal explores why and how bullet performance has improved in recent years. You’ll find plenty of other interesting content in SHOT Business magazine, including numerous gear reviews, retail selling advice, recent news briefs, ATF Q&A, and much more.
The latest issue of SHOT Business magazine is now available for FREE online. You can either read the feature stories in a conventional web layout at Shotbusiness.com, or view the magazine-style ePaper version. This takes longer to load, but you can see larger photos, and flip from page to page like a conventional print magazine.
105gr Hybrid Tests Demonstrate Excellent Accuracy and Consistency By Robert Whitley
After the initial Daily Bulletin Report on the new Berger 6mm 105gr Hybrids, I did some accuracy and consistency field testing with these new bullets. They shot so well, I thought an update was in order. My 100-yard testing has revealed much about these new bullets — all of it good so far. The test rifle was a MAK Tube Gun with a trued Rem 700 action (glued in), with a 6mm Brux 30″, 1:8″-twist barrel chambered with a no-neck-turn 6mm BRX chamber (1.563″ max case and .120″ free bore). The 6mm 105gr Hybrids fit and work well in this 6 BRX chamber configuration. (CLICK HERE to view a print of the reamer I used for the 6 BRX chamber.)
Hybrids Show Excellent Accuracy in Prone Tests (with Sling)
As some may know, I am predominantly a prone shooter and do most of my load testing prone with a sling. I chose to do the same with these Hybrids, to see how they would perform when fired as they would be in a prone match. In this case, shooting prone with sling, I shot four 10-shot groups (two 10-shot groups in each of two range session). All four groups were right around .5 MOA (i.e. each group about .750″ edge-to-edge, minus a bullet diameter of .243″ = .507″). The new Berger 6mm 105gr Hybrid bullets had no problems doing this. The groups shot were also consistent with the best groups I have been able to shoot in the past with the Berger 108gr BT bullets and the Berger 105gr VLD bullets, and I consider both of those bullets to be excellent and accurate. There is no question in my mind that these new Hybrid bullets are accurate, and the consistency is there! Check out my test targets below.
The two 10-shot targets above were shot at 100 yards on September 30th, prone with sling. The 6 BRX load was: Berger 6mm 105gr Hybrids, Lapua brass, 32.0 grains N140, Federal 205M-AR primers, .020″ jump. Note: If you put the targets over each other the groups line up perfectly.
These two 10-shot targets (above) were shot at 100 yards on September 23, prone with sling. The 6 BRX load was: Berger 6mm 105gr Hybrids, Lapua brass, 31.0 grains H4895, Federal 205M-AR primers, .020″ jump. When I can shoot 20 Xs in a row (as I did with these two targets) the rifle is really shooting well.
Accuracy needs to be coupled with consistency, especially when running longer strings of fire or in matches demanding a larger number of hits on the target. I am pleased to report that I have found the Berger 105gr Hybrid bullets to be consistently accurate bullets (i.e. there were no anomalies or fliers, they just keep going where you pointed the rifle). At each of the last two range sessions I shot back to back 10-shot groups with no break between the two (i.e. 20 shots in a row and only switching to the next target after 10 shots). Not only did the individual 10-shot groups stay tight, but if you hold each first target over the second target, the groups are right on top of one another. This is what I look for in terms of consistency — that I can keep shooting, and the bullets keep going right into the group, with no odd fliers.
105gr Hybrid Bearing Surface and Optimum Free Bore
Shooters may wonder how the new 6mm 105gr Hybrids function with the existing freebores on chambers set up for current Berger 105gr VLDs and Berger 108gr BT bullets. Based on the investigation and measuring of various chambers, here are some general guidelines:
1. For a chamber with a 1.5° throat angle, and the bullets touching the lands, the Berger 105gr Hybrid bullets sit up in the neck a little further than both the current production Berger 105 VLD Target bullets and the Berger 108gr BT bullets.
2. Based on basic measuring and testing, for the junction of the boat tail and bearing surface of a 6mm 105gr Hybrid bullet to be in the same spot as other bullets, the 105 Hybrid (Lot #3079) would need about .020″ – .025″ less freebore than recent production Berger 105gr Target VLD bullets (Lot #3220) and about .030″ – .035″ less freebore than recent Berger 108gr Target BT bullets (lot #2791).
3. Since the Hybrids are designed to work both in the lands and jumped away from the lands, some extra freebore may not be a bad thing. In truth, the 105 Hybrid bullets should work well and fit well in various 6mm chamberings (such as 6 BRX, 6 Dasher, 6mmAR etc.) which have been optimized for the previous generation, non-Hybrid 6mm Berger 105s and 108s.
The Editors of AccurateShooter.com and a pantheon of legendary shooters have collaborated on a new book, Voodoo Accuracy, destined to become the definitive print resource for precision shooting. This new 666-page, full-color treatise compiles the wisdom of today’s greatest Hall of Fame and National Champion shooters. With the Voodoo knowledge of the world’s ‘top guns’ in your grasp, you can and will shoot more accurately no matter what your discipline.
Why do Voodoo? Sure you can spend hours, days, months, heck even a lifetime measuring stuff with calipers and trickling individual powder kernels, but you’re not going to win the big matches without access to the closely-guarded Voodoo secrets of the world’s master marksmen. Remember, there are more things in heaven and earth, Horatio, than are dreamt of in your reloading manuals!
For the first time ever, Voodoo Accuracy reveals the hidden shooting secrets of the greatest trigger-pullers of all time. Now you too can shoot like a legend! Find out how to win matches without ever practicing! Apply Voodoo reloading techniques with startling results! Voodoo Accuracy contains chapters on all major forms of competitive shooting, from 25m air rifle benchrest to ultra-long range tactical competitions. Whatever your sport — point-blank benchrest, High Power, F-class, Silhouette, Palma, Multi-Gun, Biathlon, 1000-yard Benchrest — you’ll find invaluable Voodoo insights that will transform your shooting abilities overnight. We guarantee it!
Voodoo Accuracy Chapter Highlights:
● Extreme Wind Calling — How to dope a hurricane.
● Barrel Break-In — Sure-fire 50-step, 1000-round method.
● Ogive Talkin’ — More incomprehensible Ballistology by Bryan Litz.
● Point-Blank Pointers — Feng Shui and the placement of Wind Flags.
● Why Weigh Charges? — How to throw perfect charges blind-folded.
● Powder Blending Basics — Have a BLAST with the Mix-Master method.
● For FTR, Size Matters — Six-foot-wide, servo-adjusting bipods by Danny Biggs.
● Hall of Fame Headgear — The effect of dorky hats on Group Size, by Tony Boyer.
● Barrel Tuning — Voodoo Methods demonstrated (results guaranteed non-repeatable).
● Tactical Gearfinder — Be the first on your block with the latest, overpriced Tacticool accessories.
● .30-06 — THE solution to everything, including the economy and Global Warming, by G. Salazar.
● Voodoo Annealing — How to anneal by instinct (worrying about time and temperature is for sissies).
Here’s a sample from our chapter on the Joys of Abrasives: “We all learned as kids that shiny is good. Well it is. And more shiny is even better. Why settle for a bore that has anything less than a mirror finish? Just do a quick high-pressure bead-blast down your bore, followed by few thousand strokes with JB, and your bore will be perfectly slick and shiny. And you won’t have to waste any more time with those annoying lands and grooves that trap carbon and copper. They’re gone for good! Polish your bore to a mirror finish for the ultimate in barrel cleanliness.”
Order Your Own Copy of Voodoo Accuracy Voodoo Accuracy comes in a handsome, large-format hardback edition for $49.99. There is also a special, limited-run letterbox edition signed by Hall of Famers so legendary we can’t even mention their names here. The letterbox edition, limited to 250 copies, will cost $299.99. Think that’s too much? Well who can put a price on perfection? We guarantee that if you buy Voodoo Accuracy you’ll win early and often, feeding your self-esteem while reducing your shooting rivals to whimpering, broken shells of their former selves. Remember, as Charlie Sheen said, it’s all about “Winning”! If you want to run with the Big Dogs, and strut your stuff on top of the podium, order your copy of Voodoo Accuracy today!
Les Baer Custom (LBC) is a highly respected maker of “semi-custom” 1911 pistols and AR platform rifles. Now Baer moves into the precision bolt-action rifle market with impressive new offerings for 2010. Baer will sell two different bolt-guns, each fitted with a Stiller custom action and a cut-rifled barrel made in-house by LBC. Available chamberings (for both models) are .243 Win, .260 Rem, or .308 Win (later this year LCB will release a .338 Lapua). Remarkably, Baer guarantees these new guns can deliver half-MOA 10-shot groups with match grade ammo.
The new Les Baer Custom bolt-action rifles all feature a Stiller Tac 30 action with Picatinny rail, Wyatt precision floor plate with Wyatt detachable box magazine (DBM), along with a “match grade” 24″ cut-rifled, 5-groove LBC barrel. A Timney match trigger with 2.5-lb pull is fitted, and both action and barrel are coated in a matte-black Dupont S finish.
Two different Bell & Carlson composite stock designs are offered. The LBC Tactical Recon Bolt Action Rifle features a tactical-style stock, similar in appearance to the SAKO TRG stock. It has a vertical pistol grip, undercut toe, plus an adjustable cheekpiece and adjustable buttplate. MSRP for the “Tactical Recon” model is $3560.00.
If you want a lighter rifle with a more conventional stock, the LBC Tactical Varmint Classic features a varmint-style composite stock with a narrower fore-arm, “standard” wrist-grip shape, and a straight comb. There is a small hook in the underside of the buttstock. Like the “Tactical Recon” model, the “Tactical Varmint” features a Stiller action, Wyatt bottom metal/magazine, and 24″ cut-rifled barrel. MSRP for the “Tactical Varmint” is $3410.00.
New Les Baer Bolt-Guns have 10-shot Half-MOA Guarantee
We talked with Les Baer yesterday, and he told us that the prototype Baer tactical rifles have show outstanding accuracy during testing, producing some 1/2″ groups at TWO hundred yards. Accordingly, Baer is offering one of the best guarantees in the business. Both LBC tactical bolt-guns “are guaranteed to shoot 10-shot groups under 1/2 MOA with match grade ammo.”
The new LBC rifles will debut next week at SHOT Show in Las Vegas. We hope to get our hands on one for field testing. It will be interesting to see if the rifles can really put 10 shots inside one-half inch (center to center) at 100 yards.
Competition is very keen at Bridgeville. Richard Timmons, Match Director, said, “It can be challenging….it can cause you to talk to yourself!” Rookies and those interested in taking up the sport are gladly welcomed and mentored. When asked his advice for new shooters in the sport, Richard said, “Factory Class is the best place to start for beginning shooters. There are some good factory guns out there that will shoot 600 yards.”
Dewey Hancock is a rookie in his second year in the sport and is making a mark as you can see from match results and Shooter of the Year standings at Bridgeville R&P Club. He advises, “Good bench handling, good equipment, a good gunsmith, and good loading practice — these things will make you shoot with the good guys. You want to stay consistent in this game and that will eventually get you some wins.” When asked who his biggest competitor is, he smiled and said, “The wind!”, but then slipped in Roy Hunter’s name for 600 yards and Dean Breeden for the short range game. Dewey also stated what many of us in the sport know – “It is fun and the whole family can do it.”
The Editors of AccurateShooter.com and a pantheon of legendary shooters have collaborated on a new book, Voodoo Accuracy, destined to become the definitive print resource for precision shooting. This new 666-page, full-color treatise compiles the wisdom of today’s greatest Hall of Fame and National Champion shooters. With the Voodoo knowledge of the world’s ‘top guns’ in your grasp, you can and will shoot more accurately no matter what your discipline.
Order Your Own Copy of Voodoo Accuracy
