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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Future H.A.T B.C. Test shoot
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<blockquote data-quote="noel carlson" data-source="post: 358897" data-attributes="member: 16138"><p>Mark,</p><p> </p><p>Just to provide some idea of the non-equivalence of "gyroscopic", and "dynamic" stability; The ZA375/6.5-M is supposed to be stable in a 1: 10" twist based on the calculator which you linked.</p><p> </p><p>In reality, it requires a 1: 6.5" exit twist at 3,000 fps. Some very serious errors have been made by projectile manufacturers who relied too heavily on mathematical models. Bullet flight stability is very complex.</p><p> </p><p>Best,</p><p>Noel</p></blockquote><p></p>
[QUOTE="noel carlson, post: 358897, member: 16138"] Mark, Just to provide some idea of the non-equivalence of "gyroscopic", and "dynamic" stability; The ZA375/6.5-M is supposed to be stable in a 1: 10" twist based on the calculator which you linked. In reality, it requires a 1: 6.5" exit twist at 3,000 fps. Some very serious errors have been made by projectile manufacturers who relied too heavily on mathematical models. Bullet flight stability is very complex. Best, Noel [/QUOTE]
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Future H.A.T B.C. Test shoot
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