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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 PRC Build . . . What twist rate are you finding successful?
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<blockquote data-quote="LeddSlinger" data-source="post: 2037771" data-attributes="member: 65338"><p>Won't make much of a difference on muzzle velocity a person is able to achieve but there's a big difference between 9" and 10" when you calculate rotational stress forces exerted on a bullet jacket. The significantly higher the RPM of a 9" twist at the same velocity is magnified to a much greater force than a 10" twist.</p><p></p><p>Matching twist rates correctly becomes more important as the bores get bigger and the bullets get heavier because the diameter and weight of an object plays a huge part in the equation for determining rotational stress on a bullet jacket</p></blockquote><p></p>
[QUOTE="LeddSlinger, post: 2037771, member: 65338"] Won’t make much of a difference on muzzle velocity a person is able to achieve but there’s a big difference between 9” and 10” when you calculate rotational stress forces exerted on a bullet jacket. The significantly higher the RPM of a 9” twist at the same velocity is magnified to a much greater force than a 10” twist. Matching twist rates correctly becomes more important as the bores get bigger and the bullets get heavier because the diameter and weight of an object plays a huge part in the equation for determining rotational stress on a bullet jacket [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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300 PRC Build . . . What twist rate are you finding successful?
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