There are some interesting firearms featured this week on Guns & Gear, a syndicated TV show by the creators of Gun Talk Radio. This week, the Guns & Gear team tests a Smith and Wesson M&P 10 chambered in 6.5 Creedmoor. This 6.5 CM version of S&W’s AR10-platform rifle is a leading choice for the PRS Gas Gun Division. The rifle shows good build quality and good accuracy with factory 6.5 Creedmoor ammo. If you’re a fan of the 6.5 Creedmoor cartridge and want to see how it works in a gas gun, the M&P 10 is a smart option. S&W offers good customer service and a rock-solid warranty.
Along with Smith & Wesson’s 6.5 Creedmoor semi-auto rifle, Guns & Gear’s crew tests the new Ruger 8-Shot Redhawk revolver in .357 Magnum. That short-nosed wheelgun is one ugly beast, but greater ammo capacity is probably a good thing. Then the crew samples Springfield Armory’s XD handguns. There is also a fun feature on Crimson Trace Master Series Lasergrips. It’s cool to watch the laser beams track from gun to target (see below).
Here is a sneak preview of this week’s Guns & Gear Episode:
Why We Love Wheelguns
We were intrigued by the 8-shot Ruger Redhawk, being avid revolver fans. When we go out plinking with handguns, a classic revolver is often our first choice. This Editor’s S&W model 617 ten-shot .22 LR revolver probably has more rounds through it than all my other handguns. And I have a S&W Performance Center .44 Magnum that has shot 1″ groups at 50 yards (off a rest). I like full-sized revolvers for long sight radius and inherent accuracy of the fixed barrel, combined with the superb trigger break in single-action mode.
Guns & Gear Showtimes
Guns & Gear airs year-round on the Sportsman Channel on Wednesdays at 2:00 PM Eastern, Thursdays at 8:30 PM and 11:30 PM EST, Fridays at 2:30 PM EST, and Sundays at 4:00 AM EST. Find the Sportsman Channel at DirectTV Ch. 605, DISH Network Ch. 395, AT&T U-Verse Ch. 642, Spectrum Ch. 315, and your local cable provider. Watch past Guns & Gear episodes on Gun Talk Media’s YouTube Channel, or visit www.GunTalk.com.
According to Military Times, the U.S. Special Operations Command (SOCOM) is considering replacing the 7.62×51 NATO in semi-auto sniper rifles with a mid-size 6.5 mm cartridge. The two leading candidates are the 6.5 Creedmoor and the .260 Remington. These 6.5 cartridges would deliver a flatter trajectory, better long-range ballistics, and reduced recoil compared to the 7.62×51 NATO (aka .308 Winchester). While the .260 Rem enjoys a case capacity edge over the 6.5 Creedmoor, in the real world, performance is similar — both cartridge types can push a 130gr bullet to velocities around 2900 fps. (See Sierra 6.5 CM Load Data.)
“Major Aron Hauquitz told Military Times Tuesday that SOCOM is in the preliminary stages of exploring a sniper rifle chambered in the 6.5 mm caliber. The two commercially available rounds being evaluated are the .260 Remington and the 6.5 mm Creedmoor.
Research shows that both rounds will ‘stay supersonic longer, have less wind drift and better terminal performance than 7.62 mm ammunition’, SOCOM officials said.
‘We’re purely in the exploratory phase’. Hauquitz said. ‘We’re trying to see if we can take a weapon that is 7.62 and give it greater range, accuracy and lethality.'”
The SOCOM representative indicated that test rifles in 6.5 Creedmoor and/or .260 Remington might be issued to test teams later this year, but there was no issue date in place yet. Hauquitz said the 6.5 mm exploration came out of preliminary results of the Small Arms Ammunition Configuration study, which assesses commercially available ammunition and new ammo technologies.
SOCOM Also Considering Polymer Cartridges
The Military Times report also revealed that SOCOM is considering polymer-cased rifle ammunition, with the goal of reducing load weight. SOCOM’s research shows that a polymer-cased mid-sized 6.5 mm cartridge could be one-third lighter than conventional brass-cased 7.62×51 ammo. That means the next-generation 6.5 mm ammo could “come in at 5.56×45 mm weight ranges”. While SOCOM is seriously looking at this new option, polymer-cased ammo will NOT be required for SOCOM’s new semi-auto rifle. In other words, if the polymer ammo is not ready, that “would not delay potential fielding of a 6.5 mm rifle” according to Maj. Hauquitz.
Shooting Sports USA just released an excellent, in-depth article about the first-ever PRS Gas Gun Match. If you enjoy tactical-style shooting, or have an interest in modern semi-auto rifles, we strongly recommend you read this match report by SSUSA Editor John Parker. Offered in a magazine-style format, this SSUSA feature includes explanations of the rules and tactics for these matches, along with interviews with top competitors, including match winner SSG Tyler Payne of the USAMU.
Payne dominated the match, finishing 200 points ahead of the next competitor. Payne competed in Open Class shooting a JP Enterprises LRP-07 chambered in 6mm Creedmoor, running Berger 105gr 6mm Hybrids at 2975 fps. He used a Vortex Razor HD 4.5-27x56mm scope. With its 6X zoom ratio, this optic allowed SSG Payne to switch from a wide field of view to high magnification as the stage demanded. With targets out to 800 yards, having 27X on tap was useful.
There are three divisions in PRS Gas Gun Matches: Tactical Light (.223 Rem/5.56), Tactical Heavy (.308 Win), and Open. At this match, about 65% of shooters competed in Tac Light. Match Director Ryan Castle said: “The remaining 35% was split pretty evenly between Open and Tactical Heavy.”
Open Class Caliber Choices
“For Ammo in Open Class, 6mm and 6.5mm Creedmoor were popular — overall winner SSG Tyler Payne won using a rifle chambered in 6mm Creedmoor”. — John Parker, SSUSA
Gas guns to 800 yards, yep there are targets down there somewhere… Jeff Cramblit Facebook photo
Gas Gun Match Loads — Short Range vs. Long Range
“The .223/5.56 [Tactical Light] guns had some lag time waiting on shot impacts. I believe the long-term solution may be to find a light and fast load for closer stages for near-instant reaction time and use a heavy load for the long shots to see splash and get the target to move a little more.” — Sean Murphy, Nightforce
Interview with Match Winner Tyler Payne
SSG Tyler Payne told SSUSA: “This match has a lot of similarities to 3-Gun, which I’ve been shooting for 11 years now. With targets out to 800 yards, limited rounds and 30-second penalties, the match gave you the opportunity to go as fast as you wanted but really forced you to be accurate. Training for PRS has given me enough discipline to make my shots count and 3-Gun has taught me how to be efficient. Those two things helped me excel at this match. Having to slow down with a gas gun and make my shot count was very foreign to me. Usually at matches with a gas gun, you get as many shots as you want to take, so having to slow down was difficult.”
“If I had any pointers for someone wanting to try this type of match it would be to get out and confirm your data as far as you can. Don’t trust your ballistic Apps. Other than that, ask questions, watch the experienced shooters and have fun”.
For the new PRS “Gasser” Competition, the PRS developed rules on gun types, scoring, match timing, penalties, safety and other key topics. CLICK HERE for Full PRS Gas Gun Series Rules.
Open Division: The Open Division rifles will not exceed a caliber of .30 or a velocity of 3,200 fps. With this and other divisions, Match Officials may request at any point during a match that a competitor fire their rifle through chronograph..
Tactical Light Division: Tactical Light Division rifles are restricted to 5.56 NATO/.223 Remington calibers only. Bullet weight cannot exceed 77 grains and muzzle velocity cannot exceed 3,000 fps.
Tactical Heavy Division: This class is restricted to .308 Win (7.62×51) gas guns. Most will be AR-10 platform rifles. Bullet weight cannot exceed 178 grains and muzzle velocity cannot exceed 2,800 fps.
Scoring and Penalties
The Gas Gun Series utilizes a time plus penalty-based scoring system for all match scoring. This means the score is the shooter’s total combined time on all stages plus any penalties accrued.
Penalties are as follows:
30 seconds for any rifle targets not engaged or neutralized.
15 seconds for any pistol targets not engaged or neutralized.
15 seconds for hitting a “No Shoot” target.
No more than 50% of the stages at a match can utilize an unlimited round count. At least 25% of the targets in Gas Gun Series match must be 2 MOA or smaller. Max distance is 800 yards.
Forum member Kevin (aka “N10Sivern”), revealed he needs some help with a compulsion — a compulsion to keep buying more and more guns and ammo. Particularly ARs, all shapes and sizes of ARs. Way too many ARs. You could say he has an ARdiction….
In a Forum Thread, Kevin posted: “I may need an intervention. Trying to clean my office and pulled this stuff out. I’m missing an AR10 lower somewhere and an AR15 upper. I’ll find them before the day is done. I have a big box full of parts as well, and 4 barrels still in the cardboard tubes. Sigh. This is gonna be a lot of Cerakoting for me.”
Another Forum member said: “For the love of God, man. Delete this thread lest you be accused of hoarding!”
Kevin replied: “I guess I am hoarding a little. But it’s good hoarding right?”
And then he posted this “Mail Call” photo:
Kevin’s caption: “It only gets worse. Mail Call today: 20″ .308 Ballistics Advantage barrel, 26″ Savage 25-06 barrel, 700 pieces of .38 special, 300 pieces of .357 magnum, 500 pieces .308 Win, gas tube, Hornady Modified Case Gauge. I have more crap on the way too.”
Forum Member’s Chime In…
Kevin’s “Need Intervention” post drew plenty of comments from other Forum Members:
“God! It is so refreshing to see that my illness is widespread with little hope (or desire) for a cure. I smiled reading each post.” — Gary0529
“You know you have a problem when you open a drawer and find components you forgot you bought.” — JoshB
“It’s not hoarding if you intend to use it. Says he who has 12,000 primers.” — Uthink
“I guess I’ll go ahead and volunteer to help you with your obviously much needed intervention… send me the pictured items and then you’ll no longer have to deal with those nasty temptations. Just think about it, you’ll have less clutter in your office plus you’ll not have to fret over the need for any cerakoting either. I’m just one human being volunteering to help out another fellow human being who needs help!” — PikesPG
The Precision Rifle Series (PRS) for tactical bolt guns has become hugely popular. Capitalizing on that success, the PRS has approved a new Gas Gun series for semi-auto rifles such as AR15s and AR10s. Since the launch of the PRS a few seasons back, Gas Gun shooters have wanted to play. Recognizing the interest among semi-auto shooters, the PRS ran two “prototype” Gas Gun matches last year.
PRS Director Shawn Wiseman Explains New Gas Gun Series in this Video:
Based on positive feedback from the 2016 test matches, PRS founders approved a full 2017 Gas Gun series which kicks off this week. The 2017 PRS Gas Gun Series opener will be held February 17-19, 2017 at the CORE Shooting Solutions range in Baker, Florida. Here’s a video showing CORE’s facility:
For the new PRS Gas Gun Series, rules and scoring procedures needed to be developed. Accordingly, a committee of top PRS shooters, Multi-Gun shooters, and Match Directors was assembled to develop the PRS Gas Gun Series Rule Book. Highlights of the Rules are listed below.
Last month, Shooting Sports USA interviewed PRS President Shawn Wiseman. In a Question and Answer session, Wiseman outlined key elements of the new “Gasser” PRS series. Here are samples from that interview:
SSUSA: What will be the format of the 2017 PRS Gas Gun Series matches?
Wiseman: The matches will be a two day format with 8 to 10 stages per day. No more than 50 percent of the stages can be unlimited round count and 25 percent of the targets must be 2 MOA or smaller. The scoring will be overall time plus penalties with the winner being the shooter with the fastest time including all penalties. There are three Divisions; Tactical Light for 5.56x45mm NATO/.223 Rem. rifles, Tactical Heavy for 7.62x51mm NATO/.308 Win., and Open for everything else up to .30 cal. The maximum distance will be 800 yards.
SSUSA: What guns do you expect to be popular?
Wiseman: In the Open Division, I expect to see a lot of 6.5 Creedmoors for two main reasons; it’s an inherently accurate cartridge and Hornady makes great ammo for the folks that aren’t into reloading. I think the Tactical Light Division will probably be the most popular. It is hard to say specifically what rifles will be the most popular but there are a few AR companies that are known for the accuracy. Armalite, GA Precision, LaRue and Seekins will all be very popular rifles in this Series. I think we will continue to see high-end optics with 5 to 6X zoom range on the rifles. Bushnell, Kahles, Leupold, Nightforce and Vortex will continue to be the most popular.
PRS Gas Gun Series Rules
For the new PRS “Gasser” Competition, the PRS developed rules on gun types, scoring, match timing, penalties, safety and other key topics. CLICK HERE for Full PRS Gas Gun Series Rules.
Scoring and Penalties
The Gas Gun Series utilizes a time plus penalty-based scoring system for all match scoring. This means the score is the shooter’s total combined time on all stages plus any penalties accrued.
Penalties are as follows:
30 seconds for any rifle targets not engaged or neutralized.
15 seconds for any pistol targets not engaged or neutralized.
15 seconds for hitting a “No Shoot” target.
No more than 50% of the stages at a match can utilize an unlimited round count. At least 25% of the targets in Gas Gun Series match must be 2 MOA or smaller. Maximum distance is 800 yards.
Open Division: The Open Division rifles will not exceed a caliber of .30 or a velocity of 3,200 fps. A match DQ will result any rounds over the speed limit of 3,200 fps (+/- 32 fps for environmental factors and equipment discrepancies). Match Officials may request at any point during a match that a competitor fire their rifle through chronograph. If the bullet exceeds the 3,200 fps speed limit, the shooter will receive an automatic match DQ.
Tactical Light Division: Intended to allow competitors the opportunity tocompete using traditional military and law enforcement caliber. This promotes Active Duty military and law enforcement competitors use of their Service and Department-issued rifles. Tactical Light Division rifles are restricted to 5.56 NATO/.223 Remington calibers only. Bullet weight cannot exceed 77 grains and muzzle velocity cannot exceed 3,000 fps.
Tactical Heavy Division: Intended to allow competitors the opportunity to compete using traditional military and law enforcement caliber. This promotes Active Duty military and law enforcement competitors use of their Service and Department issued rifles. Tactical Heavy Division rifles are restricted to 7.62 NATO/.308 Winchester calibers only. Bullet weight cannot exceed 178 grains and muzzle velocity cannot exceed 2,800 fps. No modified wildcat rounds permitted to shoot in the Tactical Divisions Anyone discovered violating this rule will receive an automatic Match DQ. Tactical Division shooters will shoot the exact same COF as Open Division shooters.
Savage Arms has joined the black rifle bandwagon with its new MSR Series of gas guns. Savage will offer four AR-style semi-automatic rifles in 2017. Savage will offer a variety of buttstock configurations, barrel lengths, along with some interesting chambering options. The MSR 15 Patrol and Recon feature a .223 Wylde target chamber for use with 223 Rem. or 5.56x45mm. The MSR 10 Hunter and MSR 10 Long Range models are AR-10 platform rigs offered in 6.5 Creedmoor and .308 Win chamberings. The top-of-the-line MSR 10 Long Range model carries a hefty $2284 MSRP price-tag, but it does include a two-stage AR Blaze target trigger, adjustable gas block, and a genuine Magpul® PRS Gen3 buttstock.
While most of the engineering of the MSR series is classic AR, there are some interesting features and notable upgrades. The MSR 10 Long Range offers a non-reciprocating, left-side charging handle (along with conventional rear charging handle). All the MSR rifles have high-quality barrels with a durable surface hardening treatment known as Melonite QPQ. This should make the rifles run longer (with higher round count) before needing replacement barrels. Bill Dermody of Savage states: “These are high-performance barrels you’d have to buy as an upgrade with standard AR-15s.”
Savage MSR Notable Features:
Non-reciprocating SIDE charging handle on MSR 10 LR (plus normal charging handle)
1:8″-twist Barrels, Melonite QPQ hardening, 5R rifling (MSR 15 Patrol and Recon)
1:8″ or 1:10″-twist Barrels, Melonite QPQ hardening, 5R rifling (MSR 10 Hunter and LR)
Conventional AR-Type Gas System (No Op Rod)
Adjustable Gas Block (MSR 10 Hunter and LR)
Modular-Style Fore-end/Handguard
Flip-up Front and Rear Sights
Field Test of Savage MSR 15 Patrol
YouTube ace .22 Plinkster got his hands on one of the very first Savage MSR 15 Patrol M4 models. In this video, he tests it for function and accuracy, finding the MSR 15 to be “a good shooter”. He adds: “The Patrol is Savage’s entry-level M4. Because this rifle is brand new … you may want to check out Savage’s website at www.SavageArms.com.”
This Twang ‘N Bang video explains the key features of the MSR 10 Long Range, including the side charging handle and QPQ-treated barrel. It also describes the specs of the other three models.
Savage’s new MSR 10 Hunter and MSR 10 Long Range are purpose-built modern sporting rifles for game hunting and long-range shooting. Both are available in .308 Winchester and 6.5 Creedmoor chamberings. Both models are built on compact, lightweight frames and feature adjustable gas blocks, plus the MSR 10 Long Range is equipped with a non-reciprocating, side-charging handle (see below).
On the AR-15 platform, the new MSR 15 Patrol and MSR 15 Recon are chambered in .223 Wylde for safe, reliable function with both 223 Rem. and 5.56x45mm ammo. All Savage MSRs offer premium features such as 5R button-rifled barrels with Melonite QPQ surface hardening, new BLACKHAWK! furniture, upgraded sights and more. To learn more about Savage’s new line of MSR rifles, visit www.Savagearms.com/msr.
Geissele Automatics manufactures a line of two-stage triggers favored by top Service Rifle, High Power, and 3-Gun shooters. Geissele now offers a variety of trigger models for both large-pin and small-pin lowers, with pull weights from 1.8 lbs to 6.0 lbs. You select the Geissele trigger with the appropriate first and second stage pull for your discipline (refer to chart below for trigger model specs).
Video Shows Geiselle Trigger Installation in AR15
Our friend Gavin Gear of UltimateReloader.com has crafted a video showing how to install a Geissele National Match Trigger in an AR15. This video covers installation of the trigger assembly, the trigger guard, the safety selector lever assembly, and the pistol grip.
AR15 Trigger Installation Video
Follow-Up Video for AR10 Trigger Install
Gavin recently released a follow-up video which covers the installation of a Geissele Super Dynamic Trigger in an AR10. The procedure is mostly the same as for the AR15, but this video also covers removal of the AR10 factory trigger, so it’s worth watching. You may want to turn the volume down on your computer’s speakers before playback. CLICK HERE for Geissele Trigger Instruction Manual
Forum member Brian V. (aka “Carbide”) wanted a new look for his “modern sporting rifle”. He was tired of looking at black plastic (or FDE, OD green) and aluminum components on his AR15. So he decided to fit wood “furniture” on the rifle. He ordered a wood butt-stock and fore-arm set made by Lucid, but he didn’t like the two-piece fore-arm of the Lucid stock set. He decided he could build something better than the commercially-available, Lucid-made wood fore-arm.
So Brian took his existing AR tubular fore-arm and epoxied a walnut sleeve to it. With a lathe, Brian then turned the walnut sleeve to his desired dimensions: 2.250″ diameter in back and 2.200″ diameter in front, so there’s a little taper. Brian says “I could have gone a little thinner.” The wood fore-end was then sanded and stained to match the Lucid-made rear section. Brian says “the stain is not quite a perfect match, but but it looks a lot better.”
Berger Bullets has just announced a new 6.5 mm (.264 caliber) 130gr Hybrid projectile. Optimized for magazine-length seating (and AR10-friendly), the new 130gr bullets should be ideal for tactical comps and the PRS series. We expect this new bullet to work great when loaded in modern mid-size cartridges such as the 6.5×47 Lapua and 6.5 Creedmoor. Berger’s new 6.5mm 130gr Match AR Hybrid OTM Tactical bullet (could Berger come up with a longer name?) will soon be released to the public. Berger says this new 130-grainer is the first of many new bullet designs to be introduced in the next few years. Here is a run-down on the new bullet from its designer, Bryan Litz of Applied Ballistics.
NEW 130gr Hybrid — Behind the Design
by Bryan Litz, Berger Chief Ballistician
Intelligent bullet design and selection begins with an understanding of application constraints. For bullets that will be used in unlimited rifles, there are few constraints and performance can truly be maximized. However, many shooting applications have realistic constraints such as magazine feeding of loaded rounds. In constrained applications, you need to ask the question: “What’s the best bullet that will work within the constraints of my shooting application?”
The new Berger 6.5mm 130 grain AR Hybrid OTM Tactical bullet is specifically optimized for maximum performance in magazine-length ammo.
6.5mm cartridges are the second most common cartridges used by top shooters in many of the Precision Rifle Series (PRS) matches, with 6mm being the most common. These kinds of tactical matches all have stages that require repeating rifles — either AR-10 platforms or bolt guns — so magazine feeding is a must. Recognizing that Berger did not have an option that was truly optimized for this particular application, we went to work and the latest 6.5mm Hybrid is the result.
SUMMARY
The new Berger 6.5mm 130 grain AR Hybrid OTM Tactical bullet is specifically optimized for use in loaded ammo with COAL constraints for magazine feeding. This bullet maximizes overall performance through BC as well as achievable muzzle velocity in mid-capacity 6.5mm cartridges fed from AR-length magazines.
What makes this bullet optimal for magazine length ammo? To start with, the nose of the bullet is constrained in length so that when it’s loaded to mag length in 6.5mm cartridges such as the 6.5mm Creedmoor, 260 Remington and 6.5×47 Lapua, the nose of the bullet won’t be pushed below the case mouth. This can be an issue with some of the heavier 6.5mm bullets like the 140s. Furthermore, the hybrid ogive design is not sensitive to jump distance like some other designs such as the VLD.
Another consideration of length-constrained ammo is how much of the bullet is pushed down into the case. The inside of the case is for powder, and the more space you take up with bullet, the less powder you can fit in. Less powder means less total energy available, and muzzle velocity is depressed. A bullet weight of 130 grains is an optimal balance between external ballistic performance (BC) and internal case capacity considerations which translate into muzzle velocity. Further to this objective, the AR Hybrid has a minimal air gap in the front of the nose, which allows the bullet to have an even shorter OAL. When dealing with length-constrained designs, you need to pack as much bullet into as little length as possible< to optimize overall performance. Another advantage of making the bullet shorter is that stability, including transonic stability, is improved.
Although this design is length-constrained, the combination of a hybrid ogive and 7 degree Boat Tail produce a very respectable G7 form factor of 0.920 which is within 1% of the popular 6mm 105 grain Hybrid. See below for full live fire ballistic performance data.
The 6.5mm 130 grain AR Hybrid will be barely stable from a 1:9″ twist, and reaches full stability from a 1:8″ twist which is common for many 6.5mm rifles. Visit the Berger Bullets twist rate calculator to get more detailed stability information on your specific barrel twist, muzzle velocity and environment.
Cartridge Selection for Magazine Length Constraint — Advanced Analysis
The trend to smaller calibers in magazine-fed rifles is happening for a very good reason. For a .308 Winchester round, you only have 2.37 calibers of nose length available for the bullet to protrude from the case. Such a short nose will have relatively high drag for the caliber. By contrast, smaller calibers such as 6.5mm and 6mm have proportionally more length available for the nose to protrude from the case and still fit in the same COAL constraint. Proportionally longer noses mean lower drag. Proportionally longer bullets mean higher sectional density. Combine an elevated sectional density with lower drag, and you get higher BC bullets. For example, consider a 175 grain .30 caliber bullet commonly used in .308 Winchester M118LR-type ammo. These 175 grain bullets have G7 BCs in the neighborhood of .243 to .260. Neck the .308 down to 6.5mm (260 Remington) or 6mm (.243 Winchester) and now look at the BCs of the bullets available in these calibers which work within the same magazine length constraint. The 6.5mm 130 grain AR Hybrid has a G7 BC of 0.290, and the 6mm 105 grain Hybrid has a G7 BC of 0.278 — both of which are higher than the .30 cal 175 grain bullet BC. Furthermore, you get hundreds of feet per second more velocity with the necked-down cartridges as well.
All of the above translates into higher hit percentage. See the caliber comparison chart below* which is an excerpt taken from the book: Modern Advancements in Long Range Shooting which addresses this and many other topics in even more detail.
*The Weapon Employment Zone (WEZ) analysis shown above is for a 1000-yard shot on a standard IPSC silhouette in an uncertain environment having: +/- 2 mph wind, +/- 1 yard range, Muzzle Velocity SD of 10 fps, and a rifle shooting 1 MOA groups.
By Dennis Santiago Competition 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.
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 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.
Along with Smith & Wesson’s 6.5 Creedmoor semi-auto rifle, Guns & Gear’s crew tests the new Ruger 8-Shot Redhawk revolver in .357 Magnum. That short-nosed wheelgun is one ugly beast, but greater ammo capacity is probably a good thing. Then the crew samples Springfield Armory’s XD handguns. There is also a fun feature on Crimson Trace Master Series Lasergrips. It’s cool to watch the laser beams track from gun to target (see below).
Proportionally longer noses mean lower drag. Proportionally longer bullets mean higher sectional density. Combine an elevated sectional density with lower drag, and you get higher BC bullets. For example, consider a 175 grain .30 caliber bullet commonly used in .308 Winchester M118LR-type ammo. These 175 grain bullets have G7 BCs in the neighborhood of .243 to .260. Neck the .308 down to 6.5mm (260 Remington) or 6mm (.243 Winchester) and now look at the BCs of the bullets available in these calibers which work within the same magazine length constraint. The 6.5mm 130 grain AR Hybrid has a G7 BC of 0.290, and the 6mm 105 grain Hybrid has a G7 BC of 0.278 — both of which are higher than the .30 cal 175 grain bullet BC. Furthermore, you get hundreds of feet per second more velocity with the necked-down cartridges as well.
Competition 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.
