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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
264 Win Mag twist?
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<blockquote data-quote="Mikecr" data-source="post: 1227267" data-attributes="member: 1521"><p>Have you a bullet in mind, in that range, where the maker recommends a twist other than 8 ?</p><p>I just whipped across a few bullet sites, Berger, Barnes, Sierra; 8, 8, 8.</p><p></p><p>It's conservative AND best.</p><p>Stability in itself, is in a range affected by air density, and it also affects local BC.</p><p>Sg of 1.0 is gyroscopically stable, 1.3 is marginal, 1.5+ is optimum.</p><p>Marginal shoots well enough but the bullet's BC can be affected, reducing the bullet's potential.</p><p>Optimum, and on up to near blow-ups, provides the best from bullets as far as external ballistics. I couldn't vouch for terminal ballistics.</p><p></p><p>Someone should say also that any capacity larger than 260AI is merely wasted barrel life in 26cal.</p><p>More velocity won't be viable, you'll just be burning more powder for the same.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1227267, member: 1521"] Have you a bullet in mind, in that range, where the maker recommends a twist other than 8 ? I just whipped across a few bullet sites, Berger, Barnes, Sierra; 8, 8, 8. It's conservative AND best. Stability in itself, is in a range affected by air density, and it also affects local BC. Sg of 1.0 is gyroscopically stable, 1.3 is marginal, 1.5+ is optimum. Marginal shoots well enough but the bullet's BC can be affected, reducing the bullet's potential. Optimum, and on up to near blow-ups, provides the best from bullets as far as external ballistics. I couldn't vouch for terminal ballistics. Someone should say also that any capacity larger than 260AI is merely wasted barrel life in 26cal. More velocity won't be viable, you'll just be burning more powder for the same. [/QUOTE]
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264 Win Mag twist?
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