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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet RPM Per Inch Math Problem
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<blockquote data-quote="Eric_F" data-source="post: 2100545" data-attributes="member: 105437"><p>No clue if this is a worthwhile calculation, but I'm a sucker for ballistic math. In 12" of animal, are you assuming a pass through or coming to a stop? For both you would have to assume a velocity drop (and as you stated a decrease in spin rate). I can tell you I think a linear decrease in velocity and spin are very unlikely, so the math is going to get complicated, like calculus complicated. Further, you're either going to need a good estimate of the drag force of a bullet inside an animal (good luck) or an estimate of the exit velocity (shrug emoji). I typed up a longer response going through what would need to be integrated but there are so many guesstimate terms that I'm not sure it's even useful. If anyone knows of estimates of exit velocity for what you're looking for then I'll go through the math. It's simpler if you assume after 12" it stops, is that what you meant?</p></blockquote><p></p>
[QUOTE="Eric_F, post: 2100545, member: 105437"] No clue if this is a worthwhile calculation, but I'm a sucker for ballistic math. In 12" of animal, are you assuming a pass through or coming to a stop? For both you would have to assume a velocity drop (and as you stated a decrease in spin rate). I can tell you I think a linear decrease in velocity and spin are very unlikely, so the math is going to get complicated, like calculus complicated. Further, you're either going to need a good estimate of the drag force of a bullet inside an animal (good luck) or an estimate of the exit velocity (shrug emoji). I typed up a longer response going through what would need to be integrated but there are so many guesstimate terms that I'm not sure it's even useful. If anyone knows of estimates of exit velocity for what you're looking for then I'll go through the math. It's simpler if you assume after 12" it stops, is that what you meant? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Bullet RPM Per Inch Math Problem
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