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Shorter barrel with faster twist?
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<blockquote data-quote="jpfrog" data-source="post: 2398231" data-attributes="member: 32525"><p>For twist rate to bullet weight calculator, a lot of people use Berger's tool online to know if their rifle's twist will stabilize their bullet. I don't know about calculating velocity for twist but someone smarter than me will chime in soon. </p><p></p><p>For an estimate of velocity, many folks say about 20fps per inch. So if a known velocity for a round on a 24" barrel is, say for example, 2700fps and you want to use the same round on an 18" barrel…subtract 120fps for an ESTIMATED velocity (6"x20fps) to get 2700-120=2580fps</p></blockquote><p></p>
[QUOTE="jpfrog, post: 2398231, member: 32525"] For twist rate to bullet weight calculator, a lot of people use Berger’s tool online to know if their rifle’s twist will stabilize their bullet. I don’t know about calculating velocity for twist but someone smarter than me will chime in soon. For an estimate of velocity, many folks say about 20fps per inch. So if a known velocity for a round on a 24” barrel is, say for example, 2700fps and you want to use the same round on an 18” barrel…subtract 120fps for an ESTIMATED velocity (6”x20fps) to get 2700-120=2580fps [/QUOTE]
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Shorter barrel with faster twist?
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