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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist Rates and Velocity?
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<blockquote data-quote="paphil" data-source="post: 778091" data-attributes="member: 17745"><p>One other thought on spin and stability. Denser air requires a faster spin. a marginal spin at 7000 feet elevation may go unstable at sea level when shooting at a 1000 yard or farther target. Go with the mfg guidelines. If Walt Berger says you need a 1/9 for a bullet, I'd go with a 1/9. Most bullets will be stable for short distances ( less than 300 yards) regardless of the twist rate. Try shooting some 80gs in a 22-250 with a 1/14 twist. I tried them a while back, not sure where they went<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> I really don't think the faster twist reduced my velocity very much, but then once I could shoot the heavier bullets, I quit using the lighter ones.</p></blockquote><p></p>
[QUOTE="paphil, post: 778091, member: 17745"] One other thought on spin and stability. Denser air requires a faster spin. a marginal spin at 7000 feet elevation may go unstable at sea level when shooting at a 1000 yard or farther target. Go with the mfg guidelines. If Walt Berger says you need a 1/9 for a bullet, I'd go with a 1/9. Most bullets will be stable for short distances ( less than 300 yards) regardless of the twist rate. Try shooting some 80gs in a 22-250 with a 1/14 twist. I tried them a while back, not sure where they went:) I really don't think the faster twist reduced my velocity very much, but then once I could shoot the heavier bullets, I quit using the lighter ones. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist Rates and Velocity?
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