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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist vs Bullet Weight Question
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<blockquote data-quote="ARlife4me" data-source="post: 2938134" data-attributes="member: 105694"><p>If bearing surface changes center of gravity it can be offset by length of boat-tail to nose length. I use sea level for twist minimum references. Bat as earlier posted.....length is more of a factor than weight alone. Sierra for another reference on 30cal 230gr (#2251) requires an 8T 240gr (#9245) 9T and 220gr (#2240) 10T. Close in weight, but bullet parameters are different.</p></blockquote><p></p>
[QUOTE="ARlife4me, post: 2938134, member: 105694"] If bearing surface changes center of gravity it can be offset by length of boat-tail to nose length. I use sea level for twist minimum references. Bat as earlier posted.....length is more of a factor than weight alone. Sierra for another reference on 30cal 230gr (#2251) requires an 8T 240gr (#9245) 9T and 220gr (#2240) 10T. Close in weight, but bullet parameters are different. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Twist vs Bullet Weight Question
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