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<blockquote data-quote="edge" data-source="post: 349708" data-attributes="member: 5030"><p>Here is a link to an interesting website:</p><p></p><p><a href="http://www.rathcoombe.net/sci-tech/ballistics/wounding.html" target="_blank">Terminal Ballistics</a></p><p></p><p>I have never used hard cast bullets on game so I can't verify this formula from that website:</p><p></p><p><strong><em>He observed that the wound (or channel in test media) caused by hardcast flat-nosed lead bullets was proportional to velocity and to the diameter of the flat portion of the nose. I am impressed by the tests which he conducted, because he found by blacking the noses and shoulders of the bullet types he tested that the notion long held that a Keith-style semi-wadcutter cut a hole on the basis of its shoulder diameter (as opposed to its nose) was incorrect; the blacking on the shoulders was intact, only the nose was clean (this phenomenon may differ at much lower velocities or different nose shapes). On the basis of his testing, he developed cast bullet designs which are nearly cylindrical and feature a very wide flat point. These bullets are regarded as the ultimate in performance for handgun hunters in pursuit of heavy game and they also provide excellent performance in rifles chambered for older cartridges which accommodate the use of cast bullets. The empirical formulas which I have made on the basis of his investigations and theories are: </em></strong></p><p><strong><em></em></strong></p><p><strong><em>Penetration (in wetpack): </em></strong></p><p><strong><em>PEN(FN) (inches) = Bullet Weight (lbs) x Impact Velocity (fps) / Meplat Diameter (inches) / 5 </em></strong></p><p><strong><em></em></strong></p><p> <strong><em></em></strong></p><p><strong><em>Cavitation (in soft tissue): </em></strong></p><p><strong><em>CAV(FN) (inches) = Impact Velocity (fps) x Meplat Diameter (inches) / 225 - 0.725 </em></strong></p><p><strong><em></em></strong></p><p></p><p>edge.</p></blockquote><p></p>
[QUOTE="edge, post: 349708, member: 5030"] Here is a link to an interesting website: [url=http://www.rathcoombe.net/sci-tech/ballistics/wounding.html]Terminal Ballistics[/url] I have never used hard cast bullets on game so I can't verify this formula from that website: [b][i]He observed that the wound (or channel in test media) caused by hardcast flat-nosed lead bullets was proportional to velocity and to the diameter of the flat portion of the nose. I am impressed by the tests which he conducted, because he found by blacking the noses and shoulders of the bullet types he tested that the notion long held that a Keith-style semi-wadcutter cut a hole on the basis of its shoulder diameter (as opposed to its nose) was incorrect; the blacking on the shoulders was intact, only the nose was clean (this phenomenon may differ at much lower velocities or different nose shapes). On the basis of his testing, he developed cast bullet designs which are nearly cylindrical and feature a very wide flat point. These bullets are regarded as the ultimate in performance for handgun hunters in pursuit of heavy game and they also provide excellent performance in rifles chambered for older cartridges which accommodate the use of cast bullets. The empirical formulas which I have made on the basis of his investigations and theories are: Penetration (in wetpack): PEN(FN) (inches) = Bullet Weight (lbs) x Impact Velocity (fps) / Meplat Diameter (inches) / 5 Cavitation (in soft tissue): CAV(FN) (inches) = Impact Velocity (fps) x Meplat Diameter (inches) / 225 - 0.725 [/i][/b] edge. [/QUOTE]
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