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Rifles, Reloading, Optics, Equipment
Gunsmithing
What does my Cooper need?
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<blockquote data-quote="J E Custom" data-source="post: 516987" data-attributes="member: 2736"><p>Beveling the rifling is mainly to make it easier on patches and cleaning from the muzzle (Not</p><p>recommended).</p><p></p><p>The idea and function of a good crown is to allow the gas a uniform way to escape from behind </p><p>the bullet at the moment it leaves the barrel.</p><p></p><p>If the bevel (if used) or the crown is not absolutely uniform It will have an effect on the bullet</p><p>by allowing more gas to escape from one side than the other, in effect kicking the base of the</p><p>bullet to one side(Off the center line of the bore)destroying accuracy.</p><p></p><p>The edge of the bore should be square and clean/sharp. the angle of the crown is mostly a </p><p>personal thing. I like a 11o crown that is recessed for protection.</p><p></p><p>The only thing that I would suggest to try and improve the accuracy in an already fine shooting </p><p>rifle is to adjust bullet seating depth a few thousandths at a time in or out and watch for any</p><p>improvements. also check and improve concentricity if your re loads need it.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 516987, member: 2736"] Beveling the rifling is mainly to make it easier on patches and cleaning from the muzzle (Not recommended). The idea and function of a good crown is to allow the gas a uniform way to escape from behind the bullet at the moment it leaves the barrel. If the bevel (if used) or the crown is not absolutely uniform It will have an effect on the bullet by allowing more gas to escape from one side than the other, in effect kicking the base of the bullet to one side(Off the center line of the bore)destroying accuracy. The edge of the bore should be square and clean/sharp. the angle of the crown is mostly a personal thing. I like a 11o crown that is recessed for protection. The only thing that I would suggest to try and improve the accuracy in an already fine shooting rifle is to adjust bullet seating depth a few thousandths at a time in or out and watch for any improvements. also check and improve concentricity if your re loads need it. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
What does my Cooper need?
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