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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel twist
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<blockquote data-quote="Guest" data-source="post: 22462"><p>Taz -- I forgot to ask the bullet length, so try this formula-- </p><p>(180 x bullet dia x bullet dia)/ bullet length = rate of spin. If your velocity is below 2800 fps, use 150 instead of 180 as your constant. CJ</p></blockquote><p></p>
[QUOTE="Guest, post: 22462"] Taz -- I forgot to ask the bullet length, so try this formula-- (180 x bullet dia x bullet dia)/ bullet length = rate of spin. If your velocity is below 2800 fps, use 150 instead of 180 as your constant. CJ [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel twist
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