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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
280 Ackley ballistic questions
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<blockquote data-quote="iiiNelson" data-source="post: 2920139" data-attributes="member: 113766"><p>My 280AI has a 24" barrel. That being said, if I remember correctly there was a greater drop off per inch once you go below 22" (if I remember correctly) from a test that I read that compared speeds going below a 26" barrel. There was about 20-30fps per inch down to 22" but going below that it moved to like 25-40fps in that test. In either case the velocity was comparable to a 18" 7 SAUM with a 20" 280 AI. </p><p></p><p>So I'm guessing you'd lose around 120-150fps give or take for cutting off 4" from your barrel.</p></blockquote><p></p>
[QUOTE="iiiNelson, post: 2920139, member: 113766"] My 280AI has a 24” barrel. That being said, if I remember correctly there was a greater drop off per inch once you go below 22” (if I remember correctly) from a test that I read that compared speeds going below a 26” barrel. There was about 20-30fps per inch down to 22” but going below that it moved to like 25-40fps in that test. In either case the velocity was comparable to a 18” 7 SAUM with a 20” 280 AI. So I’m guessing you’d lose around 120-150fps give or take for cutting off 4” from your barrel. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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280 Ackley ballistic questions
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