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Knockdown power myths
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<blockquote data-quote="brant89" data-source="post: 1305967" data-attributes="member: 49553"><p>I try and try to explain to people that knockdown power does not exist, but the conversation usually ends with them still believing their 12ga slugs are going to roll deer over. It's pretty basic physics really; if a 200gr bullet hits a 200lb deer at 3000fps and comes to rest in the opposite shoulder then the deer has assumed all the bullets momentum (slightly different from kinetic energy). Apply Newtons First Law and you get this:</p><p></p><p>(bullet weight) x (bullet velocity) = (deer + bullet weight) x (deer velocity)</p><p></p><p>(.0286) x (3000) = (200 + .0286) x (deer velocity)</p><p></p><p>deer velocity = 0.429 fps </p><p></p><p>For a frame of reference, that is exactly the same as if you hit it with your car at a whopping .0146 mph. Probably not knocking it over...</p></blockquote><p></p>
[QUOTE="brant89, post: 1305967, member: 49553"] I try and try to explain to people that knockdown power does not exist, but the conversation usually ends with them still believing their 12ga slugs are going to roll deer over. It's pretty basic physics really; if a 200gr bullet hits a 200lb deer at 3000fps and comes to rest in the opposite shoulder then the deer has assumed all the bullets momentum (slightly different from kinetic energy). Apply Newtons First Law and you get this: (bullet weight) x (bullet velocity) = (deer + bullet weight) x (deer velocity) (.0286) x (3000) = (200 + .0286) x (deer velocity) deer velocity = 0.429 fps For a frame of reference, that is exactly the same as if you hit it with your car at a whopping .0146 mph. Probably not knocking it over... [/QUOTE]
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