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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to test bullet expansion?
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<blockquote data-quote="SSgt G Cody" data-source="post: 2351895" data-attributes="member: 113303"><p>Simplify! US Army ballisticians state that rotational spin will never increase after bullet leaves barrel, but will slowly decrease through its trajectory. It decreases at a percentage rate approximately 1/3 that of slowing velocity of bullet over the same trajectory. In other words, if bullet velocity has decreased by 1/3 at the target, rotational spin will only have decreased by 1/9. Bullet designers increase jacket thickness for hunting bullets to counteract forces exerted by bullet's spin energy upon impact. This also increases penetration.</p></blockquote><p></p>
[QUOTE="SSgt G Cody, post: 2351895, member: 113303"] Simplify! US Army ballisticians state that rotational spin will never increase after bullet leaves barrel, but will slowly decrease through its trajectory. It decreases at a percentage rate approximately 1/3 that of slowing velocity of bullet over the same trajectory. In other words, if bullet velocity has decreased by 1/3 at the target, rotational spin will only have decreased by 1/9. Bullet designers increase jacket thickness for hunting bullets to counteract forces exerted by bullet's spin energy upon impact. This also increases penetration. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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How to test bullet expansion?
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