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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A-Tips, terminal performance on big game
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<blockquote data-quote="CONatureBoy" data-source="post: 2253494" data-attributes="member: 118769"><p>Here's a quote from a 2011 article by an author who introduces himself by saying "In 1980 I had responsibility for conducting the legal review for new military weapons and ammunition required by the Department of Defense to ensure compliance with our treaty obligations." He writes,</p><p></p><p> Navy (Crane) product improvement programs led to the 7.62 MK 316 MOD 0 Special Ball, Long Range (DODIC AB39), </p><p> continuing to employ the 175-grain Sierra MatchKing, and the <strong>220-grain Sierra MatchKing .300 Winchester Magnum </strong></p><p><strong> Match MK</strong> 248 MOD 1 (DODIC AB43) in 2008. In each case wound <strong>ballistics tests based upon Dr. Fackler's protocol</strong>, </p><p> today an integral part of the legal review of new military small arms ammunition, reconfirmed Dr. Fackler's 1985 </p><p> conclusion that <strong>the terminal ballistics of OTM projectiles are similar to those of FMJ Ball, that is, they do not "expand </strong></p><p><strong> or open easily" in soft tissue</strong>.</p><p></p><p>The author describes the protocol as follows:</p><p></p><p> Dr. Fackler's tests [involved] firing the M852 into <strong>ordnance gelatin (20x25x50 centimeter blocks of a 10% weight </strong></p><p><strong> concentration shot at four degrees centigrade calibrated to reproduce the crush and stretch seen in living animal tissue</strong>, </p><p> a protocol . . . widely accepted today. . . .</p><p></p><p>You can find the full article at <a href="http://www.sadefensejournal.com/wp/open-tip-match-when-a-hollow-point-is-not-a-hollow-point/" target="_blank">http://www.sadefensejournal.com/wp/open-tip-match-when-a-hollow-point-is-not-a-hollow-point/</a>. Eventually I heard the same thing from other wanna-be long-range hunters: the SMKs failed to expand when they didn't hit bone. Any bullet will expand, and most bullets will fragment, when they hit bone. But about half of the surface area of the rib cage is not covered by bone, just skin and soft tissue. If you make a proper heart/longs shot, you have a 50% chance that you won't hit a rib on the way in. If, in that event, you only poke a hole in the ribs (as apparently I did), most of the bullet's kinetic energy doesn't transfer. The vitals may be intact enough for the animal to escape. Mine did.</p></blockquote><p></p>
[QUOTE="CONatureBoy, post: 2253494, member: 118769"] Here's a quote from a 2011 article by an author who introduces himself by saying "In 1980 I had responsibility for conducting the legal review for new military weapons and ammunition required by the Department of Defense to ensure compliance with our treaty obligations." He writes, Navy (Crane) product improvement programs led to the 7.62 MK 316 MOD 0 Special Ball, Long Range (DODIC AB39), continuing to employ the 175-grain Sierra MatchKing, and the [B]220-grain Sierra MatchKing .300 Winchester Magnum Match MK[/B] 248 MOD 1 (DODIC AB43) in 2008. In each case wound [B]ballistics tests based upon Dr. Fackler’s protocol[/B], today an integral part of the legal review of new military small arms ammunition, reconfirmed Dr. Fackler’s 1985 conclusion that [B]the terminal ballistics of OTM projectiles are similar to those of FMJ Ball, that is, they do not “expand or open easily” in soft tissue[/B]. The author describes the protocol as follows: Dr. Fackler’s tests [involved] firing the M852 into [B]ordnance gelatin (20x25x50 centimeter blocks of a 10% weight concentration shot at four degrees centigrade calibrated to reproduce the crush and stretch seen in living animal tissue[/B], a protocol . . . widely accepted today. . . . You can find the full article at [URL]http://www.sadefensejournal.com/wp/open-tip-match-when-a-hollow-point-is-not-a-hollow-point/[/URL]. Eventually I heard the same thing from other wanna-be long-range hunters: the SMKs failed to expand when they didn't hit bone. Any bullet will expand, and most bullets will fragment, when they hit bone. But about half of the surface area of the rib cage is not covered by bone, just skin and soft tissue. If you make a proper heart/longs shot, you have a 50% chance that you won't hit a rib on the way in. If, in that event, you only poke a hole in the ribs (as apparently I did), most of the bullet's kinetic energy doesn't transfer. The vitals may be intact enough for the animal to escape. Mine did. [/QUOTE]
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A-Tips, terminal performance on big game
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