At MEDIA Day 2013, we checked out McMillan’s interesting hydraulic recoil mitigation system for the TAC-50 tactical rifle. Named the TAC-50 A1-R2, this shock-absorbing device reduces the peak recoil from the 50 BMG cartridge by approximately 90 percent (90%). Additional recoil reduction is provided by the proprietary muzzle brake offered on the TAC-50 A1-R2.
The heart of the new TAC-50 A1-R2 recoil mitigation system is a proprietary hydraulic piston in the buttstock. As the rifle is fired, the piston compresses, softening the recoil by lowering the peak recoil force and spreading out the recoil over several milliseconds. The sensation for the shooter is that of a long push, rather than a violent punch.
Without the R2 recoil mitigation system, the peak recoil from a 50 BMG cartridge is approximately 7,500 lbs. of force. From start to finish, the recoil lasts 1 millisecond in a machine rest. With the R2 system, the peak recoil is only approximately 520 lbs. of force. What’s more, the force is spread out over 6 milliseconds. While the total recoil energy is roughly the same, the hydraulic piston lowers the perception of recoil dramatically for a shooter by lowering the peak force and spreading the recoil out over time.
McMillan developed the new R2 system in partnership with customers using the TAC-50 weapons system. Extensive testing with electronic load sensors and high speed photography documented the recoil mitigation. The result is a 50-Caliber rifle that is significantly more comfortable to shoot.
Story Tip by Ed LongRange. We welcome reader submissions.
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Are you a died-in-the-wool .50 BMG fan? Got a hankerin’ for heavy artillery? Then visit the FCSA Photo Gallery page. There you’ll find hundreds of photos from Fifty Caliber Shooting Association (FCSA) matches and fun shoots in California, Nevada, New Mexico, and Washington. To access the photos from the Gallery Page, click on the colored tabs which indicate match location and date (such as NV2011-08).
Photo sets go all the way back to 2002, so you can see the evolution of the hardware over the years. Sample multiple archives to see the differences in terrain from one range to another — from Raton’s alpine setting to the hot, dry Nevada desert. This Gallery is really a treasure-trove of .50-Cal history. It’s worth a visit. Here are a few sample images.
Story Tip from EdLongrange. We welcome reader submissions.
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Are you bored with your “whimpy” .50 BMG? Looking for something with a little more punch? Well J.D. Jones and his team at SSK Industries have created a truly big boomer — the .950 JDJ. As its name implies, rifles chambered for the cartridge have a bore diameter of 0.950″ (24.13 mm). This would normally make such rifles “destructive devices” under the 1934 National Firearms Act (NFA). However, SSK obtained a “Sporting Use” exemption allowing the rifles to be sold without special restrictions as destructive devices. CLICK HERE to watch .950 JDJ being fired.
.950 JDJ Specifications
Rifle Cost: $8000.00
Ammunition Cost: $40.00 per round
Projectile Weight: 3,600 grains (more than half a pound)
Rifle Weight: Between 80 and 120 pounds
Muzzle Energy: 38,685 ft/lbs (52,450 Joules)
Momentum: 154.1 Newton-seconds
As crafted by SSK Industries, .950 JDJ rifles use McMillan stocks and very large-diameter Krieger barrels fitted with a massive 18.2-lb muzzle brakes. The ammo produced by SSK features solid 3,600 grain bullets and CNC-machined cartridge brass. It is also possible (through a lot of work), to use a 20mm cannon casing shortened and necked-down.The primer pocket is swaged out to accept a .50 cal machine gun primer. That 3,600 grain bullet is just massive — it weighs more than half a pound. The cartridge propels its 3,600 grain bullet at approximately 2,200 fps. This yields a muzzle energy of 38,685 ft-lbs and a momentum of 154.1 Newton-seconds. The energy on target (knock-down power) is comparable to WWI-era tank rounds.
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Using a “box-stock”, 30-lb Steyr HS.50 rifle, Walter Wilkinson of Edgewood, NM, bested a field of 31 competitors (most using heavier custom rifles) to take the Hunter Class Score title at the recent Fifty Caliber Shooters Association World Championships. This event was held July 1st and 2nd at the NRA Whittington Center outside Raton, NM. This is the second year in a row that a competitor with an off-the-shelf Steyr HS.50 won the Hunter Class title. (Eduardo Abril de Fontcuberta won Hunter Class with an HS.50 last year.)
Wilkinson, a retired U.S. Army Special Forces sergeant major and current Gunsite Academy instructor, ran up a two-day Aggregate score of 274-6X out of a possible 300, beating his next closest competitor, .50 Cal legend Lee Rasmussen, by two Xs. The Hunter Class is a 1,000-yard course of fire consisting of six, five-shot strings, with three strings shot on the first day, and three strings shot on the second day. Due to the wildly varying winds on this range, competitors who shot in the morning of the first day were required to shoot in the afternoon of the second day, and vice versa, to equal the playing field.
Slotted in the first afternoon’s fourth relay, Wilkinson’s consistency, solid wind-doping and holding skills paid off as the winds made an especially tricky display with a 180-degree shift as thunderheads came over the Sangre de Cristo Mountains. Heading into his morning relay on the second day, Wilkinson found himself in second place with nothing to do but hammer the 10-ring to work his way into the championship title.
Wilkinson’s .50 Delivered Quarter-MOA Groups During Load Testing
Wilkinson said the Steyr .50-Cal has shown outstanding accuracy: “As I was working up a load for the HS.50, I shot groups that amazed me. I was getting groups of .214 MOA at 220 yards, and I didn’t know what to think. All the bullets were going in the same hole, and it was like ‘Wow, I’ve really got a rifle that can shoot here’. They were the best groups that I have ever shot in my life — and they were with the .50 BMG!” That surprised Wilkinson: “With my [military] experience with the performance of the same cartridge overseas, I didn’t expect that kind of accuracy out of it.”
Wilkinson Was Also Member of Winning .50 Cal Team
Along with his individual Hunter Class Title, Wilkinson earned team honors as a Ten-X team member. The Ten-X team won the Team World Championship with an aggregate score of 1081-24X combined with an average group size of 14.549 inches. Each team had four shooters with one from each of the four classes represented at the .50 Caliber Championships: Light, Heavy, Unlimited, and Hunter.
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Alliant’s Powder for 50-Caliber Applications
In 2009 Alliant unveiled Reloder 50, a new powder designed for long-range, 50-caliber rifle shooters. According to Alliant, the burn rate is “a little slower than Winchester 860″ and the powder is showing excellent lot-to-lot consistency. Load density is optimized for the 50 BMG and similar cases. Like Reloder 17, Reloder 50 employs a process which penetrates the kernels with the burn-rate-controlling chemical. This should allow a longer, flatter pressure curve, yielding more velocity than conventional powders can deliver. Alliant says that Reloder 50 offers “superior velocity and the ability to burn cleaner (with less residue).” Reloder 50 comes in both 1-lb (#150527) and 8-lb (#150528) containers.
Giraud 50 BMG Case/Bullet Comparator Giraud Tool makes a comparator for 50-Cal cartridges. The double-ended comparator is quite versatile. In one orientation you can measure base-to-ogive bullet length and also measure cartridge OAL from rim to bullet ogive. When reversed, you can use the comparator to measure cartridge headspace. The $30.00 Giraud 50 BMG Comparator gauge is constructed of 303 stainless and fits most any vernier, dial, or digital caliper. CLICK HERE for more info.
Lyman 50 BMG AccuTrimmer and Forster 50 BMG Trimmer
50 BMG enthusiasts asked for a reasonably-priced 50 BMG case trimmer and Lyman responded with an Accutrimmer designed specifically for that cartridge. Easy-to-use course and fine cut-length adjusters are positioned on the right side (by the handle). The shell head fits into a special holder which centers the case. The unit comes complete the 50-Caliber neck pilot. This case trimmer, including pilot, costs $59.99 at MidwayUSA.com.
Forster Products also makes a dedicated 50 BMG trimmer. Forster’s cutter tip is much sharper than the cutter on the Lyman AccuTrimmer. However, with the Forster tool you will pay more for that superior cutting ability — Forster’s 50 BMG trimmer costs $92.95 at Sinclair International.
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Here’s a good deal for you 50 BMG shooters. Wideners.com has NEW 8-lb jugs of military ball (spherical) powders on sale for just $39.00 per jug. That works out to just $4.88 per pound. Two types are offered at this price: WC867 and WC872. Both types are NEW never-loaded powders, not re-claimed or “pull-down” propellants. Wideners notes: “There is almost no difference between WC867 and WC872 powder and the same loading data is used for both. The slight differences will depend on the bullet used, the neck tension, whether you are shooting a bolt action or semi auto. Use loading data for AA8700, work loads up accordingly.”
While these powders are optimized for the 50 BMG, WC867 and WC872 can be used for other maxi-sized cartridges that require a very slow-burning propellent. To make this an even better deal, Widener’s will waive the Hazmat fee if you purchase six (6) 8-lb jugs: “Buy in Increments of 6 and we will pay the Hazardous Material Fee for you. That is 6, 12 or 18 Kegs etc.; if you buy less than 6, you will pay the Hazardous Materials Fees.” To order, visit Wideners.com or call 1-800-615-3006.
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There was a lot of buzz at the Defiance Machine booth at SHOT Show. The new Defiance actions are beautifully made, and they have already been used in some impressive custom rifle builds. Defiance, based in Columbia Falls, MT, has rolled out a line-up of four (4) custom actions: Rebel, Mutant (for tubeguns), Renegade (for .408 CheyTac), and Titan (for 50 BMG). These actions all feature beautiful machining, with Wire EDM-cut lug ways, advanced-design extractors, and a true one-piece bolt. All action materials are pre-hardened before machining to prevent changing tolerances during heat-treating. Southpaws will be happy that both right and left-hand versions of all four actions are offered.
The Rebel actions feature a Remington 700 footprint for ease of inletting and stock compatibility. Notably, the Rebel actions are available in four lengths. Buyers can choose Medium, X-Medium, Long, or X-Long lengths to accommodate all popular factory chamberings and extended-length handloads. Multiple magazine well cuts are available for all of today’s popular magazine types including hinged floorplates, DBMs, or single-shot. For a rock-solid optics installation, Defiance can supply Mil-spec Picatinny rails with various built-in MOA geometry. This stout rail is secured to the action with five pins and 1/4-28 X 1/2″ screws. Base price on a Rebel is $1270.00 (Medium) or $1300.00 (Long), with many available extra-cost options. Defiance says delivery will take at least 60 days from order date.
We were very intrigued by the Mutant action with its integrated recoil lug. Offered in Medium and Long action lengths, Defiance’s new Mutant receiver is made specifically for the Eliseo RTM and RTS Chassis Systems. The Mutant features an extended tenon length for increased barrel thread contact and bedding surface. (Extended tenon is optional on the Rebel). The Mutant’s integral recoil lug adds rigidity and simplifies tubegun assembly. Medium-action Mutants are typically built with a Guardian mag-well cut to accommodate AI and AW magazines, while Long-action Mutants fit AI single-stack magazines and can be of Badger length or the longer CIP length for extended-OAL cartridge loading. The starting price on a Mutant action is $1200.00 (before options), and delivery is at least 60 days out.
The beefy Titan (50 BMG) and Renegade (.408 CheyTac) actions look like they will become very popular with the big-caliber shooters. These jumbo actions share the advanced features of their smaller cousins, but they are sized up significantly to provide additional strength, stiffness, and bedding surface. On both big actions double-plunger ejectors are used in combination with M16 extractors for reliable case ejection. Both Titan and Renegade actions are offered either as a single-shot or repeater. The Titan is currently sold exclusively through Proof Research, while the Renegade is not yet in production. Defiance plans to build 600 Renegade actions later this year, after demand is filled for the Rebels and Mutants. The anticipated price for the Renegade is $1750.00.
OK, we suspect we’ve whet your appetite. For final pricing (with customer-ordered options) and availability call Defiance at (406) 756-2727. For specs, features, and lots more photos, visit DefianceMachine.com. Contact Proof Research, 406-756-9290, with order questions about the 50 BMG Titan action.
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Here’s a fun gift item from Vat19.com — a bottle opener made from de-milled .50 BMG cartridges. These .50 Caliber Bottle Openers are made by hand in the USA by a group that donates at least 15% of its profits to helping wounded soldiers via the Travis Manion Foundation.
The price is $14.99. Considering the simple design, we bet many of our readers could make their own bottle opener using an old cartridge, a Dremel tool, and a file. If that’s too much work, you can order the .50 Cal bottle opener from Vat19.com. This item has been so popular that it is currently sold out, but Vat19.com is expecting to receive more inventory on December 19th — right before Christmas.
Here’s an interesting invention from Ballistics Research, a Georgia-based security company that specializes in projectile barrier and containment systems. Ballistics Research has come up with a Interlocking Protection System (3-D IPS) that uses interlocking composite blocks — similar to giant Lego blocks — that will stop rounds up to .50 BMG. Two layers of blocks will even contain a 23mm cannon round. The Anti-Armor Ballistics Composite (AABC) blocks are lighter than concrete or other building materials, and they withstand repeated fire much better than old-fashioned sandbag stacks. Ballistics Research claims that its AABC composite is “the only material in existence that actually gains strength with incoming rounds.”
Most conventional protection units available to the military and corporate worlds (like sandbags or concrete) are non-portable, or they degrade rapidly under sustained fire. Ballistics Research’s AABC™ material actually becomes stronger with multiple hits. In fact, each of the 3-D IPS blocks is capable of absorbing thousands of rounds of machine gun fire without failure.
Video Shows Effectiveness of 3-D IPS System
The Video below shows a 3-D IPS Block wall being tested first with a full-auto 5.56×45 M16, next an M60 machine gun firing 7.62×51 rounds, and finally a “Ma Deuce” shooting .50 Cal API M2HB Armor Piercing Rounds. This is all done at very close range. The AABC material soaks up ALL the projectiles. Very impressive indeed….
While 3-D IPS block installations are designed primarily for military compounds, or commercial sites (such as power plants) where high security is required. However, they can be used in any location where secure protection from high-velocity projectiles is required. For example, 3-D IPS blocks could be used for a down-range storage building on a shooting range. For more information, visit BallisticsResearch.com, call (678) 679-1973 or email: wayne@ballisticsresearch.com.
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As posted in the Calguns.net a while back, there was a nasty out-of-battery firing incident involving a BOHICA Arms .510 DTC AR15 upper. The cause of the out-of-battery firing is not certain but it appears that the ammo was not sized properly and the firing pin may have been stuck in the extended position. As a result, the round went off before the bolt was closed with the lugs seated. In the process, the bolt handle broke off, as the bolt retracted violently, actually ending up outside the bolt raceway.
The shooter was badly injured, with multiple broken bones and ligament damage to his left hand and tissue damage to his right hand. The shooter was holding the rifle with his left hand near the front of the chamber where a gas vent was located. Gas and shrapnel existed the vent hole causing the severe injuries to the left hand.
From range reports, it appears that the shooter had been struggling to chamber previous rounds, and was having trouble closing the bolt. After talking with one of the rangemasters, a poster on AR15.com reported: “The guy was using new reloads that weren’t exactly fitting well into his chamber. [The shooter] was slamming the bolt handle with his palm trying to get the cases to lock in. The guy was also slamming the bolt forward full force from the rearmost position back and forth trying to ram the cases into chamber in an attempt to squeeze the rounds in so the bolt could close. Finally, on one of the attempts … the possibly stuck firing pin rams into the primer and explodes the round when he slams the bolt forward (zero lug engagement hence the KB) and shooter puts himself into a world of hurt.”
Lessons Learned — Don’t Try to Force Oversize Ammo into a Chamber
By all reports, the shooter’s ammo wasn’t fitting his chamber properly. In an effort to force the ammo into the chamber, he worked the bolt with excessive force. That MAY have caused the firing pin to extend or the hammer to fall without the trigger being pulled. One theory is that the trigger system may have been modified, allowing the hammer to fall from the force of slamming the bolt forward. Others have speculated that the firing pin may have failed to retract because the bolt handle was over-torqued — a safety issue listed in the BOHICA manual.
Whatever caused the out-of-battery firing, it appears that improperly-sized ammo (or a poorly-cut chamber) was the root cause of the problems. If you go to a range and find your bolt does not close easily over the ammo — STOP SHOOTING — don’t try to force the issue. Disaster may result. To paraphrase Johnnie Cochran: “If the ammo doesn’t fit, it’s time to quit”.
Photos by Wildcard, originally posted on Calguns.net.
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Cabelas.com and LaserLyte have teamed up to produce compact laser bore-sighters that fit inside your firearm’s chamber. The laser is housed in a brass assembly machined to duplicate an actual cartridge. To activate the laser, simply place the bore-sighter in the rifle’s chamber and close the bolt. There are two core units, the Laserlyte Cabela’s Premium .223 (collimated lens $99.00) and the Pro .223 (standard lens $69.99). Both the Premium and Pro bore-sighters fit a .223 Rem, but they can be adapted to other chamberings by adding a caliber-specific sleeve over the .223 core unit. In addition, LaserLyte makes separate in-chamber bore-sighters for the 17HMR and 50 BMG.
Adapt Basic Unit to other Calibers with SAAMI Sleeves
Both the Premium and the Professional .223 Boresighters can be used for a variety of chamberings by fitting additional caliber-specific sleeves (sold separately). Each sleeve is precision-machined from brass to SAAMI specs. Available chamber sleeve calibers include:
Bore-Sighting the Old-Fashion Way
We are not big fans of laser bore-sighters, as we think they are unnecessary for most situations — at least with conventional bolt-action rifles. Visual bore-sighting is not difficult. Set up your gun securely on bags, remove your bolt and set up a 50-yard target with a large bright orange or black center circle. Look through the back of the action and you should be able to sight down the bore with your own eyes just fine. In fact it may be easier to bore-sight the “old-fashioned way” rather that try to see a laser in bright sunlight at 50 or 100 yards.
When a Laser Bore-Sighter is Valuable
There are instances when having a laser bore-sighter can save time, such as when setting up a chronograph. Also, with many semiautos and lever guns, it is difficult to sight down the bore because of the action design. Without using mirrors, it’s hard to visually bore-sight an M1 Garand, for example. Likewise, it can be difficult to bore-sight an AR15, because the stock and buffer is in line with the bore. For these rifle types, a laser bore-sighter is a valuable tool.
In-Chamber Laser Should Be Safer
We like the new LaserLyte design because it fits in the chamber, rather than in the bore. In-Chamber laser bore-sighters are also made by Aimshot, Firefield, and SightMark, in a variety of sizes. With muzzle-entry laser bore-sighters, you could have a nasty accident if you forget to remove the device. There is always the chance you could chamber and fire a round with the muzzle-entry bore-sighter still in place. Instant Kaboom. That has happened more than once. The new LaserLyte/Cabela’s bore-sighter fills your chamber, so there is no possibility you could chamber a loaded round with the bore-sighter in place. That’s an important safety advantage. The LaserLyte K-50 in-chamber bore-sighter is shown in the video below.
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Ransom recently introduced the Ransom Rifle Master ‘SL Mega Rest’, a large, modular rest system for FSCA, NBRSA, and IBS shooters and other shooting disciplines that allow a rest system. We persuaded accomplished NBRSA point blank and long range shooter John Crawford to check out this system and share his experiences. This article is Part One of a two-part series.
Ransom’s SL Mega Rest: Part One (First Impressions) by John Crawford
Upon receiving the Ransom SL Mega Rest, the first thing I noticed was how well the rest was packaged. There were two boxes, a large box holding the two base plates and a small box holding all of the small parts for the rest. The large box is double-walled, cardboard construction. It held up well to the rigors of shipping, keeping the two rest halves, each in their own inner box, in perfect shape.
Unpacking the Ransom SL Mega Rest one could not help but notice the weight of each half and their very attractive, black, Rhino coating. [Rhino coating is a heavy, extremely durable and tough, textured polyurethane coating commonly sprayed in the bed area of pickup trucks to protect the bed from damage.] Unpacking the small parts, which were all packaged separately for protection, gave me a good chance to note their excellent fit and finish. The small parts are made of steel and have a black oxide finish, including the ½:20-threaded legs which have nicely knurled knobs and lock rings. The black oxide finish compliments the bases.
Front Section
The front base and post, used exclusively for elevation adjustment, are well built and have some very nice features. The post, which is 1.25″ in diameter, has a keyway and key in the front to keep it from turning, and the lockdown bolt has a carbide ball in the end to lock the post in place. The mariner’s wheel has a cogged rubber belt on the outside (fits into a groove) and makes adjusting height easy and comfortable without hand slippage. The post assembly can be located, front-to-rear, in one inch increments, to provide a center-of-front-rest-base-to-center-of-rear-rest-base distance of from 24″ to 32″, thus accommodating an 8″ difference in stock length.
The Ransom SL Mega Rest’s elevation rest top is a modular system. The base for the rest top broke tradition and has two bolts, side by side, to hold it to the post, a welcome change from having a single bolt to hold the top on. With two bolts you reduce the stress when putting a heavy rifle on the rest. The front post is mounted to a plate that bolts down to the rest base. The rest base has a series of tapped holes that allows one to adjust the front rest location, front-to-rear, to fit different stock lengths.
Rear Section
The rear rest, used exclusively for windage adjustment, has the rest top holder bolted in place. As a modular system, you can put the elevation rest top bag holder or windage top bag holder in either the front or rear rest as needed. You could also have a few different elevation rest tops or windage tops for different rifles. Both front and rear rests have a bubble level.
The Ransom SL Mega Rest’s windage top and bag holder are also modular. You can put the windage top and bag holder, or just the bag holder, in either the front or rear rest by removing four thumb screws and changing the tops. You can buy different width rest tops and swap them out in a few minutes, a nice feature for different stock length and width configurations. The windage top has a dovetail fit with a center bolt to hold the top in place and has no perceivable side play or movement, nice and tight and the windage adjusts easily.
The forearm stop is well thought out and fully adjustable for height and length to accommodate different front bag heights and stock lengths/positions. It can be adjusted forward about 4″ and, in height, from 1-1/2″ to 3-1/2″. It easily adjusts with two thumb screws.
83 pounds of Steel Solidity
The bridge plate between the front and rear rests is also black Rhino-coated, matching the bases. There are four dowel pins in the bridge plate for alignment and six 5/16-18 bolts that securely hold the bridge plate in place. The rest can be shot with the bridge plate in place, as a one-piece rest system, or the bridge plate can be removed, making it a two-piece rest system.
The rear rest with windage top weighs 38 pounds and the front rest weighs 45 pounds, for a total weight of 83 pounds. This is without sand bags or sand. Overall the all-steel-construction, Ransom SL Mega Rest is well thought out, nicely finished, and made to the standards and quality you would expect from the Ransom Company. The MSRP for the whole unit (everything except sand bags) is $1,330.00. This includes front heavy bag plate, and rear windage-adjustable bag plate. Additional plates (for different sized bags) start at about $90.00. Next step is to fill my sand bags and do some field testing. We’ll cover that in Part Two of this review, later this spring.
Test Arranged by Edlongrange.
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Are you bored with your “whimpy” .50 BMG? Looking for something with a little more punch? Well J.D. Jones and his team at 
Using a “box-stock”, 30-lb 
Alliant’s Powder for 50-Caliber Applications
Here’s an interesting invention from 
Rear Section
