Robert Whitley has a new .224 version of the 6.5 Grendel cartridge. The goal was to create a low-recoil but high-BC round to use in AR-platform match rifles. Based on the performance Whitley is getting, we think this wildcat would also be an excellent bolt-gun round.
Whitley tells us: “I have recently been working on another 6.5 Grendel progeny I have made up and call the ‘.224 AR Mag’, which is the 6.5 Grendel case necked down to accept .224″ bullets. I am very impressed by this cartridge and Berger Bullets’ .224″ heavy, high-BC bullet offerings are just beautiful (dimensionally and otherwise) for use with the cartridge. I also have reloading dies for the .224 AR Mag and I am going to make up a page on my website for the sale of AR-15 uppers chambered in the .224 AR Mag.
Above you can see the new 224 AR Mag cartridge (right) next to a .223 Rem (left) and a Berger 82 gr BT bullet (right) next to a Sierra 77 gr BTHP bullet (left bullet). The Berger bullet has a good bit higher BC than the Sierra 77 BTHP (.432 BC for the Berger vs. .362 BC for the Sierra). In the 224 AR Mag, the Berger 82 gr BT bullet sits at 2.260″ OAL (.010″ off the lands and a perfect magazine length) with the junction of the boat tail and bearing surface just ahead of the neck and shoulder of the case. You cannot properly load the 82s to mag length in a .223 Rem because the case is so long the bearing surface of the bullet starts to disappear into the mouth of the case, and at magazine length the Sierra 77s sit so far back in the .223 Rem case they hog valuable powder capacity.
The .224 AR Mag has a powder capacity of 36 grains of H2O vs. about 29.5 grains of water weight capacity for the .223 Rem. That’s a major difference in powder capacity. In addition you have bullets like the .224 Berger 90gr VLD and 90gr BT bullets that have BCs of .552 and .525 that can be driven very effectively and fast by the .224 AR Mag because of its case capacity. Bear in mind the brass is all Lapua small primer brass as well — what’s not to like?
I have done chrono testing of the cartridge with Varget and RL-15, using the Berger 82 gr BT and the Berger 90 gr BT bullets. This cartridge really can spit them out fast! (See load data below).” NOTE: Whitley could drive both bullets about 100 fps faster using 28.0 grains of Varget or RL15, but those loads approached max practical pressure. Start low and work up.
Ruger has jumped on the “black rifle” bandwagon. One of the more popular (and unexpected) product releases at the 2009 NRA Annual Meeting was yet another AR15-style rifle, Ruger’s new $2000.00 SR-556 carbine with gas-piston upper. For tactical applications the gas piston design is a good idea. It keeps vented gases away from the bolt/bolt carrier assembly, allowing the gun to run MUCH cleaner and cooler. This is something the U.S. military should have adopted 40 years ago, and in fact, the father of the M16, Gene Stoner, employed a gas piston on his Stoner 63 back in the ’60s. More recently Heckler & Koch (and other smaller companies) have developed gas-piston uppers for the AR platform. Ruger’s new SR-556 represents the first time a major American gun-maker has offered a complete AR-style rifle with the gas-piston technology.
The Ruger SR-556 does offer some nice components, including a full-length Picatinny-style rail on top, folding Troy Industry battlesights, and a comfortable Hogue pistol grip. However the SR-556 still uses the common six-position adjustable AR stock, something we consider a poor design (the cheek weld is too low for use with scopes and the stock’s underside has many projections that can hang up on slings and gear). Doubtless Ruger will sell many SR-556 rifles to a market starved for AR-style inventory, but we wish Ruger had gone a step farther in design evolution and done more than just slap a piston upper and rails on a 40-year old design. We also wonder if many buyers will be deterred by the SR-556’s hefty $1995.00 (MSRP) price-tag.
Garand Matches are among the most popular of CMP events, and the M1 Garand, acquired direct from the CMP, still represents a great value among collectible, military-style firearms. Recognizing the demand for accurate, yet affordable ammunition for M1 Garands and M1As(civilian version of m14), Federal® has introduced new American Eagle ammo expressly designed for these popular classes of rifles. M1 Garand and M1A shooters now have a quality yet economical ammo option, which reduced risk of slam-fires.
Special Loads for Special Rifles
The M1A and M1 Garand are storied rifles with a huge following. Unfortunately, much of the hunting ammunition today isn’t suitable for these special rifles. “We know there is a very large number of shooters who use the M1A and M1 Garand rifles at the range,” said Kyle Tengwall, Federal’s director of marketing. “Whether it’s practicing for a competition, or just spending some time at the range, these shooters need affordable loads that perform well. These new loads cater to this special segment of shooters, and we’re proud to offer them something that shoots great and is available at price that can’t be beat.”
These special loads use staked primers to reduce the risk of firearm malfunction, including slamfires. The M1 Garand load features a 150-gr FMJ bullet and a carefully selected propellant that produces pressures that match the gas system design. The M1A load utilizes a 168-grain Open Tip Match (OTM) bullet that gives match-grade accuracy at an unbeatable price.
Given the many matches won and records set by 6BR Improved cases, both 6 BRX and 6 Dasher varieties, product planners at Nammo Lapua have shown some tentative interest in manufacturing an official 6BR Improved case. This would be something very similar to a 6BRX, with about 41-42 grains of capacity, compared to about 38 grains for the 6BR. The case would be bigger than a 6BR, but smaller than a 6-6.5×47 or 6XC. The case would retain the small primer pocket and small flash hole of the 6BR case. A “bigger BR” would easily drive the 105-108gr 6mm bullets at 2950-3000 fps, where they often seem to shoot the best.
Before you jump out of the chair shouting “Oh Boy!”, keep in mind that Lapua’s interest is very preliminary — the engineers are merely fact-finding. This is just in the “idea stage”. Lapua’s cartridge designers are, however, intrigued by the accuracy and efficiency of the 6BR Improved case. Anything that regularly sets world records is worth considering. And Lapua would like to have a cartridge that will prove superior to the 6XC in international 300m competition.
AccurateShooter.com’s Editors have advocated the production of an “official” 6BR Improved. This wildcat deserves to become standardized. We suggest that it be similar to the 30-degree-shoulder 6BRX, but with a longer neck than a BRX (which loses neck length as the shoulder is moved forward). Existing BRX shooters could simply trim the necks shorter as needed to fit existing chambers. Dasher fans could proceed to “improve” the shoulder to 40 degrees, for their preferred configuration.
Obviously, as with any potential product, the question remains “is there sufficient market demand to justify production set-up and tooling costs?” We think the answer is yes. Not only would a factory 6BR Improved case be popular with Benchrest and across-the-course shooters, but this case would be great for varminters looking for something with more velocity than a 6BR but better barrel life than a 22-250. So, would you be interested in a factory 6BR Improved? Express your views in our Product Poll.
Butch Lambert sent his new ShadeTree Engineering F-Class rest base to German Salazar in Phoenix for testing and evaluation. The Daily Bulletin previewed a prototype rest base last month. (CLICK HERE for previous report.)
ShadeTree Rest is Lightweight and Easily Assembled
Designed to be light for air travel and easy carrying at the range, the anodized aluminum rest base weighs just 3 pounds without the top or feet. Once fully assembled, this rest base is lighter than anything else on the market, but provides all the stability needed on the range. The legs attach with thumbscrews and the center section slides right in. Assembly was a matter of a minute or two and can be done at the range without any tools. The legs have an I-beam section for light weight and rigidity, the anodizing is well-executed. Almost any currently-made top assembly will fit the base as will the leg screws. We found the rest to be well designed and manufactured.
Bruno Wins Match Using ShadeTree Rest Base
Well-known benchrester Lester Bruno of Bruno Shooters’ Supply also shoots F-Class in matches at the Ben Avery Shooting Facility. Lester volunteered to give the rest a workout. Lester used the rest in a local 600-yard match May 2nd. Lester’s first comment was that the ShadeTree rest was a lot easer to carry on and off the firing line than a heavy cast iron rest. After shooting the match, Lester confirmed the rest’s ease of use and stability. Given that Lester won the match, we can surmise that the rest was an effective tool for the job and a worthwhile product for any F-Class shooter, particularly one who travels by air. To learn more about price and availability of the F-Class rest base, call Butch Lambert at (972) 524-2247 or email papawlambert [at] starband.net.
You may have heard rumors about a new 100gr projectile from Berger Bullets. Eric Stecker, Berger’s Master Bulletsmith, confirmed that there will be not one but TWO new 100gr match bullets coming soon from Berger, one in 6mm and one in 6.5mm. These are both boat-tail designs using J4 jackets. Eric explains: “Both these bullets are based on Berger’s proven designs, with standard length ogives and 9° boat-tails. Nothing radical. They are built in response to shooters’ requests to expand our bullet line-up to include new weight options in 6mm and 6.5mm.”
New 100gr 6.5mm Bullet for High Power
Berger’s new 6.5mm 100gr BT Target projectile provides a low-recoil, lighter-weight option for target rifle shooters using the 6.5×47 Lapua, 6.5 Creedmoor, 260 Rem, and 6.5-284 cartridges. The new 6.5mm 100-grainer was created in response to requests from High Power and Across-the-Course shooters for a lighter-recoiling, accurate boat-tail bullet for “short line” work. We predict this bullet may also work well for varmint and small-game hunters. This bullet features a short boat-tail and a “mildly secant” design which should work well either seated into the lands or jumped away from the lands. Bryan Litz says: “it’s definitely not a VLD, but it has a different ogive curve than a typical tangent-ogive bullet.” The shorter length of the 100gr bullet, compared to 140gr-class 6.5mm bullets, should also allow tactical shooters to easily load their ammo to mag length. The calculated BC of the new bullet is 0.370, significantly higher than flat-based 100gr 6.5mm bullets from other manufacturers. A minimum twist rate of 1:10” is recommended for Berger’s hew 6.5mm 100gr Target Bullet.
New 100gr 6mm Match Bullet — More Velocity Than 105/108
Long-range benchresters have had great success with the Berger 108gr match bullet, introduced in 2007. Given the popularity of its tangent-ogive 108, Berger has been developing a shorter, lighter version, which can shoot faster than the 108 in small cartridges such as the 6mmBR, 6mmAR (6-6.5 Grendel), and 6 PPC. The new 6mm 100-grainer will be very similar to the 108. The 100 has the same ogive curve and boat-tail as the 108 but has a shorter OAL and shorter bearing surface (0.368″ vs. 0.409″). A minimum twist rate of 1:8” is recommended for the new 100 — same as for the 108. In a 6BR rifle, the 100-grainer’s reduced bearing surface, combined with reduced mass, should enable Berger’s new 100gr 6mm bullet to fly 50-70 fps faster than the 108 (with charges of equal pressure).
However, there is a trade-off. Being shorter and lighter, the 100-grainer has a lower BC compared to its 108gr big brother. While the Berger 108 has a 0.511 BC, the calculated BC for the 100-grainer is 0.475. That BC difference will show up at long range, but the extra speed of the lighter bullet may enable it to reach a higher, optimal “velocity node” which may deliver superior accuracy in some rifles. We will be testing the new 100-grainer soon. In a 6BR that might max out at 2850 fps with the 108s, we predict the 100gr Berger should run close to 2900 fps. In a 6BR that delivers 2900 fps currently with the 108s, you may see 2950 fps (or more) with the new Berger 100s. The 2900-2950 fps speed range is a well-known “accuracy node” for both 6mm and 6.5mm bullets.
Weaver is the latest company to introduce a new series of Japanese-made optics with a high (5:1) zoom ratio. The new Super Slam series includes 2-10×50, 3-15×50, and 5-20×50 riflescopes, all offered with 1″-diameter main tubes and four (4) reticle options: Dual-X (med. duplex), Fine Crosshair (with dot), Illuminated Duplex, and Weaver’s proprietary EBX™ ballistic reticle. According to Tom Knudtson, Weaver Product Line Manager. “This new EBX reticle allows for accurate bullet trajectory compensation for long-range shots and is a perfect compliment to our 3-point erector system with improved spring design.” Among the new 1″-tubed Super Slams, we think our readers will be most interested in the 6-20x50mm. This 27.5 oz. scope features side-focus parallax control, extra-hard lens coatings, and “pull-up” turrets (no caps to lose). The 6-20×50 has 1/8-MOA clicks and 3 finishes are offered: Matte Black, Gloss Black, and Silver.
Tactical Super Slams Have Front Focal Plane (FFP) Reticles
There are two new Japanese-made Super Slam Tactical Models, the 3-15×50 (#800362), and the 4-20×50 (#800360). Both scopes feature 30mm main tubes, large fixed turret knobs (no caps), and a mil-dot reticle. Notably, both Tactical models have the reticle in the front (first) focal plane. This means the size of the reticle (and the mildots) remain the same (relative to the object viewed) at all magnification levels. That is an important feature for shooters using the mil-dots for ranging. FFP design is logical for a true “tactical” scope, and Weaver was wise to incorporate FFP into the Super Slam Tactical scopes. Weaver claims these Tactical scopes are waterproof, fogproof, and shockproof.
Germany’s Vero Vellini has released a new double-strap sling system that holds your rifle securely, while allowing you to keep both hands free while hiking or stalking game. Vero Vellini’s new “High Climbing Double Sling” is modeled after the Biathlon rifle slings used in the Winter Olympics.
If you have ever tried a Biathlon-type sling you know it is far superior to a conventional over-one-shoulder sling, when you need to run, climb, or to move rapidly from one shooting position to another. We predict this double sling will become popular with alpine hunters and tactical/practical rifle shooters who must move rapidly through a multi-stage back-country course.
As with a conventional sling, the new double sling can be used to steady your shot. By looping the sling behind the elbows, you’ll get better support when taking an off-hand shot. The fully-adjustable “High Climbing Double Sling” comes in Forrest Green with Dark Brown trim. The product is very nicely made — the “air cushion” neoprene shoulder straps have stout leather end panels and the webbing and snap-buckles are top quality.
The “High Climbing Double Sling”, item V17350, retails for $89.99. To order, contact Vero Vellini’s USA dealer, Pioneer Research, (800) 257-7742. Vero Vellini also manufactures fast-access cartridge cases, scope covers, and straps for binoculars and cameras.
A good range box is a truly essential piece of kit. Among the many range boxes available, the MTM model RBMC-11 Range Box leads the pack in terms of versatility. It is rugged, it has plenty of storage space, plus it doubles as a handy cleaning station. This Editor has used the MTM Range Box to clean rifles and as a “range expedient” rifle holder when adjusting scopes and tensioning action screws. It’s a good product that does the job.
Fitted Cleaning Cradles
The key feature setting the RBMC-11 apart from most range boxes is the rubber-coated cradle system. Wide enough to fit a 3″-wide fore-arm, the cradles slide into vertical slots on either end of the box. This allows your range box to serve as a stable maintenance station. The RBMC-11 is really pretty stable in this role, and the cradles won’t mark your stock. The cradles even feature slots on each side to hold your cleaning rods when not in use. The MTM Range Box is secure enough to stay in place when you’re brushing the barrel. However, if you’re working on a carpeted bench top, you may want to keep one hand on the box when running a cleaning rod through the bore, just to ensure the box doesn’t slide.
Versatile Upper Tray with Dividers
The MTM Range Box has two major components — the box base (with cradles), and a large upper tray with hinged top and carry handle. This large upper tray clamps securely to the bottom unit for transport. The top tray has a long section that holds cleaning rod guides, long brushes, grease syringes and the like. There are two, clear-plastic fitted divider trays. These will hold your patches and jags, plus comparators, ring wrenches, and other small tools.
What Might Be Improved
Though we really like the MTM Range Box, it’s not perfect. First, we wish the box was a bit deeper, to have added carrying capacity. The dimensions of the MTM Range Box are: 25″ long x 11.5″ wide x 8.75″ high. We’d like to see it 12″ high/deep to allow larger solvent bottles to stand upright and to provide more space to carry tools and shooting muffs. However, it is deep enough to hold the large 100-round MTM cartridge boxes that are popular with many shooters (see photo at right).
The cradles are very nicely designed, and will hold your rifle securely without marking the stock. However, we’ve found that sometimes the rear cradle grips the gun so well that the cradle slides out as you lift the gun up. This is not a big deal, but it does demand a little extra attention when you’ve finished cleaning. We really like the twin clear plastic dividers that fit into the large removeable top-tray, but we wish the dividers had individual hinged tops. This would keep patches and small parts more secure.
The MTM Range Box costs about $50.00 at most vendors. CLICK THIS LINK to order from Amazon.com for $48.95:MTM® Shooting Range Box.
(FYI, Amazon.com rebates a portion of the purchase price from each sale to AccurateShooter.com. This helps support this website.)
Randy Robinett of BIB Bullets is well-known for his exceptionally accurate flat-base bullets. Used with 30BRs, Randy’s 112-125gr flat-base BIBs have won countless BR for score matches, and Robinett’s 30-caliber 187-grainer recently set a new 1000-yard IBS world record in the hands of Joel Pendergraft.
Robinett announced something new this week — a 108gr, 6mm boat-tail projectile. Yep, that’s right … a BIB boat-tail. The new bullet features a conventional, tangent ogive shape, but the boat-tail is only .082″. That’s quite short compared to other 6mm bullets in the same weight range. Why the shorter boat-tail? Randy believes that a short boat-tail delivers the desired drag-reduction in a long-range bullet, while offering a larger base for the expanding gas to push. In addition, Robinett strongly believes that short boat-tails can be made with much less run-out (on the tail section). With longer boat-tails, Randy says, there is much greater risk of the tail section being swaged off-center.
Looking at the new bullet, we were concerned with the long bearing surface. Would that increase in-barrel friction and thereby reduce velocity compared to other 6mm bullets of similar weight? Apparently not. Our Asst. Editor Jason Baney has tested some BIB 108 prototypes. Jason’s Oehler chronograph revealed the BIB 108s will run within 10-15 fps of other similar-weight 6mm bullets, with the same powder charge. Jason pushed the BIB 108 up to 3200 fps without problems. (Test rifle was a 6-6.5×47 with 1:7.8″ twist barrel). Jason has not done extensive group testing, but he says these bullets definitely show promise accuracy-wise. He notes, however: “with the BIB 108s you’ll want a bare minimum 0.090″ freebore, and a longer freebore would be better.”
BC and Bullet Specifications
What about BC? Calculated (G1) BC for the new 108s is 0.543, but Robinett says “real world testing suggests an actual BC of about .52, as opposed to the calculated 0.543″. The new bullet is designed to perform well in the popular 8-twist 6mm barrels. According to Randy, the “ideal twist rate is 1 turn in 8.3 inches. This produces a 1.5 Stability Factor (Sg) 1.5 at sea-level, standard conditions. The Sg with 1:8.5″ twist is still a very good 1.4 Sg.”
The BIB 6mm, 108gr BT features an 11-caliber tangent ogive, 0.052″ meplat diameter, and a 12 degree x 0.082″ long (abbreviated) BT. The BIB 108s are fairly “fat”, measuring 0.2435+ at the pressure ring and 0.2433 in the middle of the bearing surface. Given the bullet shape and dimensions, Randy believes “this bullet will prove easy to tune.” For more information visit BIBullets.com.
Robinett is now accepting orders for the new 108gr 6mm BIB. The 108s will cost $320.00 per 1,000, plus shipping. Minimum order quantity is 250 bullets. To order, please call (515) 438-4010, or e-mail bibrob [at] netins.net.
Given the many matches won and records set by 6BR Improved cases, both 6 BRX and 6 Dasher varieties, product planners at 
Weaver is the latest company to introduce a new series of Japanese-made optics with a high (5:1) zoom ratio. The new 
Germany’s Vero Vellini has released a new double-strap sling system that holds your rifle securely, while allowing you to keep both hands free while hiking or stalking game. Vero Vellini’s new “High Climbing Double Sling” is modeled after the Biathlon rifle slings used in the Winter Olympics.
What Might Be Improved
.
Robinett announced something new this week — a 108gr, 6mm boat-tail projectile. Yep, that’s right … a BIB boat-tail. The new bullet features a conventional, tangent ogive shape, but the boat-tail is only .082″. That’s quite short compared to other 6mm bullets in the same weight range. Why the shorter boat-tail? Randy believes that a short boat-tail delivers the desired drag-reduction in a long-range bullet, while offering a larger base for the expanding gas to push. In addition, Robinett strongly believes that short boat-tails can be made with much less run-out (on the tail section). With longer boat-tails, Randy says, there is much greater risk of the tail section being swaged off-center.
