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Hunting
The Basics, Starting Out
Bullet weight selection
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<blockquote data-quote="BoomFlop" data-source="post: 1692258" data-attributes="member: 55851"><p>Speed doesn't change the twist, but it does change the spin/rpm of the bullet after it leaves the barrel.</p><p></p><p>RPM=MVx720/twist (in inches)</p><p></p><p>180,000 rpm=2500x720/10</p><p>252,000 rpm=3500x720/10</p><p></p><p>So to spin the bullet the same amount of times, it would require a 7 twist at 2500 fps.</p><p></p><p>So to answer your question...72,000 times more per minute.</p><p></p><p>Steve</p></blockquote><p></p>
[QUOTE="BoomFlop, post: 1692258, member: 55851"] Speed doesn’t change the twist, but it does change the spin/rpm of the bullet after it leaves the barrel. RPM=MVx720/twist (in inches) 180,000 rpm=2500x720/10 252,000 rpm=3500x720/10 So to spin the bullet the same amount of times, it would require a 7 twist at 2500 fps. So to answer your question...72,000 times more per minute. Steve [/QUOTE]
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The Basics, Starting Out
Bullet weight selection
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