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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Copper vs lead
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<blockquote data-quote="trubkir17" data-source="post: 2021046" data-attributes="member: 112555"><p>I don't mean velocity isn't important. I mean we all want as much as we can get. However if the barrel doesn't have enough twist to start you can not overcome that with velocity alone. </p><p>At 3100fps and a 1:9.5" twist barrel = 234,947 rpm at the muzzle</p><p>At 3100fps and a 1:8" twist barrel = 279,000 rpm at the muzzle.</p><p></p><p>Even if you increased the MV to 3700fps out of the 1:9.5" barrel to achieve the 279000 rpm the jbm calculator shows that stability only improves very marginally. Therefore my conclusion is that rotation speed alone is not a critical factor in bullet stabilization.</p></blockquote><p></p>
[QUOTE="trubkir17, post: 2021046, member: 112555"] I don't mean velocity isn't important. I mean we all want as much as we can get. However if the barrel doesn't have enough twist to start you can not overcome that with velocity alone. At 3100fps and a 1:9.5" twist barrel = 234,947 rpm at the muzzle At 3100fps and a 1:8" twist barrel = 279,000 rpm at the muzzle. Even if you increased the MV to 3700fps out of the 1:9.5" barrel to achieve the 279000 rpm the jbm calculator shows that stability only improves very marginally. Therefore my conclusion is that rotation speed alone is not a critical factor in bullet stabilization. [/QUOTE]
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Copper vs lead
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