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Long Range Hunting & Shooting
Help with muzzle break
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<blockquote data-quote="J E Custom" data-source="post: 1900098" data-attributes="member: 2736"><p>Sometimes we out think a problem and create a different problem. I looked back at the recoil test we performed on the 375 H&H and found some information that may help.</p><p></p><p>With a 300 grain bullet @ 2500 ft/sec and a chamber pressure just under 50,000 Psi the best recoil reduction was 50.6 % (Recoil without a brake in 8 pound rifle was 49.2 ft/lbs) After many different styles/designs of brakes, the best tested was a side port with no ports top or bottom. Muzzle rise was minimal.</p><p></p><p>Previous testing on other cartridges showed that uneven shaped ports did not function as well reducing recoil and induces unbalanced vectoring of the gases. Trying to control muzzle rise buy altering the location and angle of the ports was not very effective and any change in the load effected the rifle noticeably.</p><p></p><p>The most effective way to control recoil was with Ports angled 90o to the bore and buy installing One small port in the top of the brake. This port has to be tuned for the load buy increasing the diameter slowly, working up to the level you want. If it is to big it will apply down force great enough to force the muzzle below the aiming point.</p><p></p><p>We found that the best accuracy was also achieved with the use of apposing ports of uniform size and shape with No top ports or any design that attempted to perform this function. All brakes tested reduced recoil by the nature of redirecting the ignition gasses, but the percent of reduction was any where from 18 to 20% up to 50 % on the same rifles. The magnums ( 90 of powder and up) showed the same percentage on the low end of brake design up to 70 % on well designed brakes.</p><p></p><p>What I am trying to say is other than looks, the unusual port designs don't produce the best recoil reduction so keep the design simple and you will be rewarded with better recoil reduction and control.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1900098, member: 2736"] Sometimes we out think a problem and create a different problem. I looked back at the recoil test we performed on the 375 H&H and found some information that may help. With a 300 grain bullet @ 2500 ft/sec and a chamber pressure just under 50,000 Psi the best recoil reduction was 50.6 % (Recoil without a brake in 8 pound rifle was 49.2 ft/lbs) After many different styles/designs of brakes, the best tested was a side port with no ports top or bottom. Muzzle rise was minimal. Previous testing on other cartridges showed that uneven shaped ports did not function as well reducing recoil and induces unbalanced vectoring of the gases. Trying to control muzzle rise buy altering the location and angle of the ports was not very effective and any change in the load effected the rifle noticeably. The most effective way to control recoil was with Ports angled 90o to the bore and buy installing One small port in the top of the brake. This port has to be tuned for the load buy increasing the diameter slowly, working up to the level you want. If it is to big it will apply down force great enough to force the muzzle below the aiming point. We found that the best accuracy was also achieved with the use of apposing ports of uniform size and shape with No top ports or any design that attempted to perform this function. All brakes tested reduced recoil by the nature of redirecting the ignition gasses, but the percent of reduction was any where from 18 to 20% up to 50 % on the same rifles. The magnums ( 90 of powder and up) showed the same percentage on the low end of brake design up to 70 % on well designed brakes. What I am trying to say is other than looks, the unusual port designs don't produce the best recoil reduction so keep the design simple and you will be rewarded with better recoil reduction and control. J E CUSTOM [/QUOTE]
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