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Hunting
The Basics, Starting Out
"Knock down" power
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<blockquote data-quote="Dave King" data-source="post: 51599" data-attributes="member: 3"><p>Here's an item I get excited about, just saw another reference to it.</p><p></p><p>The statement generally sounds like this...</p><p></p><p>This rifle/bullet is SO POWERFUL that if "knocks the animal off it feet". These statements in most instances are taken as standard hunter exageration of power but there are folks that actually believe this happens.</p><p></p><p>The latest one I saw was about a round nose bullet out of a 7mm-08 physically "knocking" an aninal down.</p><p></p><p>It's just not possible for a 150 grain bullet fired from a sporting firearm to actually knock an animal the size of a deer off it's feet.</p><p></p><p> Hollywood does not help with this myth. They have stuntmen flying around from the impact of a 9mm or a shotgun blast, not too realistic. (I personally witnessed a person being hit at point-blank range with a 230 grain 45 cal bullet and the person didn't initially even realize they'd been shot.)</p><p></p><p> As I understand it and attempt to explain the problem is as follows.</p><p></p><p> One must convert the two objects to similar weight units. The bullet is in grains and the critter is expressed generally in pounds. 1 pound = 7000 grains.</p><p></p><p> A 100 pound live weight deer (teeny tiny Florida whitetail) = 700,000 grains</p><p></p><p> 150 grain 30 caliber bullet.</p><p></p><p> Now we divide the energy from this bullet in the total weight of the animal (assume the bullet actually stops in the animal).</p><p></p><p></p><p> 700,000 / 150 = 4,666 times the mass for the deer as compared to the bullet.</p><p></p><p> 3000 ft/lbs of energy divided by this 4,666 mass differential. 3000/4666 = .643 ft/lbs.</p><p></p><p></p><p> </p><p> I'm sure Warren has the better physics explanation about why this can't happen.</p><p></p><p>[ 11-30-2001: Message edited by: Dave King ]</p></blockquote><p></p>
[QUOTE="Dave King, post: 51599, member: 3"] Here's an item I get excited about, just saw another reference to it. The statement generally sounds like this... This rifle/bullet is SO POWERFUL that if "knocks the animal off it feet". These statements in most instances are taken as standard hunter exageration of power but there are folks that actually believe this happens. The latest one I saw was about a round nose bullet out of a 7mm-08 physically "knocking" an aninal down. It's just not possible for a 150 grain bullet fired from a sporting firearm to actually knock an animal the size of a deer off it's feet. Hollywood does not help with this myth. They have stuntmen flying around from the impact of a 9mm or a shotgun blast, not too realistic. (I personally witnessed a person being hit at point-blank range with a 230 grain 45 cal bullet and the person didn't initially even realize they'd been shot.) As I understand it and attempt to explain the problem is as follows. One must convert the two objects to similar weight units. The bullet is in grains and the critter is expressed generally in pounds. 1 pound = 7000 grains. A 100 pound live weight deer (teeny tiny Florida whitetail) = 700,000 grains 150 grain 30 caliber bullet. Now we divide the energy from this bullet in the total weight of the animal (assume the bullet actually stops in the animal). 700,000 / 150 = 4,666 times the mass for the deer as compared to the bullet. 3000 ft/lbs of energy divided by this 4,666 mass differential. 3000/4666 = .643 ft/lbs. I'm sure Warren has the better physics explanation about why this can't happen. [ 11-30-2001: Message edited by: Dave King ] [/QUOTE]
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The Basics, Starting Out
"Knock down" power
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