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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
muzzle brake question?
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<blockquote data-quote="J E Custom" data-source="post: 1067694" data-attributes="member: 2736"><p>Thanks to everyone that thinks I can solve the problem. I will try.</p><p></p><p>There are several things I would look for.</p><p></p><p>But first, the length past the barrel has nothing to do with the vibrations. people shoot suppressors</p><p>that are 12'' or longer and don't experience anything like that and large brakes actually dampen barrel harmonics. </p><p></p><p>1 - I would suspect you are having bullet strikes because=</p><p></p><p>If the bullet strikes the brake you will have all sorts of vibrations and that could be from an improper bore diameter It should be .020 to .030 larger than the bullet(To small for the bullet to clear if there is any misalignment of the threads), an improper barrel tenon (Not concentric with the bore) poor thread concentricity with the bore.</p><p></p><p>And with the bullet striking the partitions between the holes or ports it would get worse as the bullet proceeded down the Brake because the error would get worse and shave bullet jacket at every baffle.</p><p></p><p>And as far as the brake unscrewing, if the bullet is striking the brake, bullet rotation from barrel twist may be unscrewing the brake.</p><p></p><p>To be sure, I would have to actually look at the brake and the installation. But if you unscrew the brake you should be able to see bullet strikes looking from the back of the brake.</p><p></p><p>Muzzle work after the bullet is long gone so there shouldn't any vibrations if installed correctly </p><p>and are machined correctly to prevent an imbalance in the gas discharge.</p><p></p><p>I once repaired a ported brake that was installed with all of the bore holes drilled to proper size except the one nearest the muzzle.(The drill/reamer was not pushed through far enough to pick up the last hole and it was 1/4" and the bullet was a .308.</p><p></p><p>So check the bore all the way through for everything I mentioned and maybe you will find the problem.</p><p></p><p>If you can send us a picture of the brake and maybe that will help.</p><p></p><p>PS ; don't shoot the rifle until you figure it out what the problem is.</p><p></p><p>Hope this helps.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1067694, member: 2736"] Thanks to everyone that thinks I can solve the problem. I will try. There are several things I would look for. But first, the length past the barrel has nothing to do with the vibrations. people shoot suppressors that are 12'' or longer and don't experience anything like that and large brakes actually dampen barrel harmonics. 1 - I would suspect you are having bullet strikes because= If the bullet strikes the brake you will have all sorts of vibrations and that could be from an improper bore diameter It should be .020 to .030 larger than the bullet(To small for the bullet to clear if there is any misalignment of the threads), an improper barrel tenon (Not concentric with the bore) poor thread concentricity with the bore. And with the bullet striking the partitions between the holes or ports it would get worse as the bullet proceeded down the Brake because the error would get worse and shave bullet jacket at every baffle. And as far as the brake unscrewing, if the bullet is striking the brake, bullet rotation from barrel twist may be unscrewing the brake. To be sure, I would have to actually look at the brake and the installation. But if you unscrew the brake you should be able to see bullet strikes looking from the back of the brake. Muzzle work after the bullet is long gone so there shouldn't any vibrations if installed correctly and are machined correctly to prevent an imbalance in the gas discharge. I once repaired a ported brake that was installed with all of the bore holes drilled to proper size except the one nearest the muzzle.(The drill/reamer was not pushed through far enough to pick up the last hole and it was 1/4" and the bullet was a .308. So check the bore all the way through for everything I mentioned and maybe you will find the problem. If you can send us a picture of the brake and maybe that will help. PS ; don't shoot the rifle until you figure it out what the problem is. Hope this helps. J E CUSTOM [/QUOTE]
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muzzle brake question?
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