Another massive, data-driven field test has been completed by our friend, Cal Zant, over at PrecisionRifleBlog.com. The past few months, Cal has tested 20+ muzzle brakes designed for 6mm, 6.5mm, and .30-caliber precision rifles. Hundreds of hours have gone into this research, and it provides a lot of new insight and empirical data for several aspects of muzzle devices. Cal put a huge amount of labor/engineering into these tests and his findings deserve to be widely read.

CLICK HERE for PRB Muzzle Brake Test Overview | CLICK HERE for 6mm + 6.5mm Brake Test Results

PRB Muzzle Brake Test Methodology

Recoil Reduction
Cal created a system to directly measure the entire recoil force signature of each muzzle brake using high-speed sensors. Although the recoil cycle happens very quickly (around 1/100th of a second), his test equipment could record up to 1,000 force data points during a single recoil cycle! He fired over 1,000 rounds of match-grade ammo through four different rifles: 6XC, 6.5 Creedmoor, .308 Win, and the monster .300 Norma Magnum. He literally spent thousands of dollars on this part of the test, to ensure he got it right.

Cartridge Types Tested: 6XC, 6.5 Creedmoor, .308 Win, and .300 Norma Magnum

Ability To Stay On Target
David Tubb helped Cal develop this part of the test, because David believes this is the most important aspect of a muzzle brake. Using a laser and high-speed camera, Cal was able to objectively quantify how well each design helped you stay on target.

Noise Level
Muzzle brakes are loud, but some are louder than others … three to four times as loud. Cal enlisted the help of an expert from the suppressor industry to precisely measure how much louder each muzzle brake made a rifle. Each brake was tested in accordance with MIL-STD-1474D using calibrated military-approved equipment, and the noise level was also tested at the shooter’s position. This produced some interesting results.

Zant also includes high-res photos of each brake, and plans to publish other info about each model (including price, whether it requires gunsmithing, what calibers it is available in, etc.) to make it easy to compare them side-by-side.

Cal recently started publishing the results of these tests, and there is already a lot of interesting info. The data might surprise a few people and even dispel a few myths. Particularly interesting is Zant’s comparison of recoil reduction with a suppressor compared to muzzle brakes. How do you think the suppressor performed compared to the brakes? You may be surprised.

Here are brake test findings for 6mm and 6.5mm. Click image for Test Results.

Here are brake test findings for .308 Caliber. Click image for Test Results.

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.