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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel twist rate's affect on pressure
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<blockquote data-quote="J E Custom" data-source="post: 482270" data-attributes="member: 2736"><p>Pressure comes from many things, but the twist rate is not considered one of them.</p><p></p><p>The number of groves,chamber,free bore,bullet size and shape, Etc. all have more effect on</p><p>pressure than the twist rate.</p><p></p><p>Velocity is more effected by twist and grove count and the only twist rate that I know of the </p><p>makes any real difference is a gain twist.</p><p></p><p>Longer barrels can/may reduce pressure because of the use of slower burning powder,</p><p>reducing peak pressure and increasing velocity.</p><p></p><p>With all things being equal bullet seating depth (Jump it the lands)probably has the most </p><p>effect on pressure.</p><p></p><p>So dont make it difficult on yourself,just load according to the loading manuals and watch </p><p>the primers and/or bolt lift.</p><p></p><p>Have fun with the new rifle.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 482270, member: 2736"] Pressure comes from many things, but the twist rate is not considered one of them. The number of groves,chamber,free bore,bullet size and shape, Etc. all have more effect on pressure than the twist rate. Velocity is more effected by twist and grove count and the only twist rate that I know of the makes any real difference is a gain twist. Longer barrels can/may reduce pressure because of the use of slower burning powder, reducing peak pressure and increasing velocity. With all things being equal bullet seating depth (Jump it the lands)probably has the most effect on pressure. So dont make it difficult on yourself,just load according to the loading manuals and watch the primers and/or bolt lift. Have fun with the new rifle. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel twist rate's affect on pressure
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