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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What Grain is suitable for 1/15 twist if 308
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<blockquote data-quote="jebel" data-source="post: 1914308" data-attributes="member: 106189"><p>Bullet stability is a function of twist relative to bullet weight and length (length more important). It's also affected by atmospheric conditions.</p><p></p><p>There is no one twist for all bullets of a given weight because in spite of a common weight they will have different lengths. This is particularly true with monolithics, which are longer due to having less density than lead.</p><p></p><p>It's best to look at the specifics of a particular bullet to see how well it will stabilize at your twist rate. Plug the details into a calculator, like the JBM version (linked).</p><p></p><p>[URL unfurl="true"]https://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi[/URL]</p></blockquote><p></p>
[QUOTE="jebel, post: 1914308, member: 106189"] Bullet stability is a function of twist relative to bullet weight and length (length more important). It’s also affected by atmospheric conditions. There is no one twist for all bullets of a given weight because in spite of a common weight they will have different lengths. This is particularly true with monolithics, which are longer due to having less density than lead. It’s best to look at the specifics of a particular bullet to see how well it will stabilize at your twist rate. Plug the details into a calculator, like the JBM version (linked). [URL unfurl="true"]https://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi[/URL] [/QUOTE]
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What Grain is suitable for 1/15 twist if 308
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