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Rifles, Reloading, Optics, Equipment
Gunsmithing
Muzzle break threading 300 win mag
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<blockquote data-quote="J E Custom" data-source="post: 1313737" data-attributes="member: 2736"><p>Thanks Edd.</p><p></p><p>.076 is still 1/2 the recommended barrel wall (.150) to be safe. Quality barrels have to meet a very specific Mill analysis and test reports (MTR) and should be as good or better than low pressure tubing.</p><p></p><p>The exit pressure at the muzzle of most firearms is between 12,000 and 18,000 +/- and with back pressure applied by the brake It is higher. So you not only have burst pressure you also have mechanical pressure.</p><p></p><p>Another downside of this barrel thread diameter is the compression of the barrel tenon when the muzzle brake is tightened due to the thread thrust at 60o.</p><p></p><p>As discussed earlier, if minor thread diameters of smaller threads are used,9/16x28, the barrel wall thickness over a .308 bore would be .028 (5 times thinner than the recommended barrel wall of .150.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1313737, member: 2736"] Thanks Edd. .076 is still 1/2 the recommended barrel wall (.150) to be safe. Quality barrels have to meet a very specific Mill analysis and test reports (MTR) and should be as good or better than low pressure tubing. The exit pressure at the muzzle of most firearms is between 12,000 and 18,000 +/- and with back pressure applied by the brake It is higher. So you not only have burst pressure you also have mechanical pressure. Another downside of this barrel thread diameter is the compression of the barrel tenon when the muzzle brake is tightened due to the thread thrust at 60o. As discussed earlier, if minor thread diameters of smaller threads are used,9/16x28, the barrel wall thickness over a .308 bore would be .028 (5 times thinner than the recommended barrel wall of .150. J E CUSTOM [/QUOTE]
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Muzzle break threading 300 win mag
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