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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Low velocity impact testing
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<blockquote data-quote="elkaholic" data-source="post: 1181816" data-attributes="member: 13833"><p>Thanks Steve! I have been advocating for years that twist rates do indeed affect expansion. If you think about it rationally, going from an 8 to a 7 twist at 3000 fps increases the rotational velocity by thousands of rpm. This HAS to put more pressure on the integrity of the bullet. I also believe, that along the same line of thought, more tissue damage occurs because of this same increase in rotation with a jagged jacket.</p><p>I have posted this before but I think it is worth saying again. The dept. of defense did a test YEARS ago with 110 gr. bullets fired both from an '06 and a 30 carbine. I think the mv of the carbine was a little over 2000' and they fired the '06 at a distance that duplicated the velocity of the carbine at the muzzle. The bullets were fired into gelatin and the wound channel was photographed and measured. The results were amazing in favor of the '06. I should add that the '06 had a 10 twist and I believe the carbine was a 16. I have done a lot of bullet testing myself, and find no reason to dispute what the military found. Good luck with your business and keep on testing! This is an important issue and more people should be aware of how these things work together for better terminal performance.....Rich</p></blockquote><p></p>
[QUOTE="elkaholic, post: 1181816, member: 13833"] Thanks Steve! I have been advocating for years that twist rates do indeed affect expansion. If you think about it rationally, going from an 8 to a 7 twist at 3000 fps increases the rotational velocity by thousands of rpm. This HAS to put more pressure on the integrity of the bullet. I also believe, that along the same line of thought, more tissue damage occurs because of this same increase in rotation with a jagged jacket. I have posted this before but I think it is worth saying again. The dept. of defense did a test YEARS ago with 110 gr. bullets fired both from an '06 and a 30 carbine. I think the mv of the carbine was a little over 2000' and they fired the '06 at a distance that duplicated the velocity of the carbine at the muzzle. The bullets were fired into gelatin and the wound channel was photographed and measured. The results were amazing in favor of the '06. I should add that the '06 had a 10 twist and I believe the carbine was a 16. I have done a lot of bullet testing myself, and find no reason to dispute what the military found. Good luck with your business and keep on testing! This is an important issue and more people should be aware of how these things work together for better terminal performance.....Rich [/QUOTE]
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Low velocity impact testing
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