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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
is copper jacket spinning around lead core during flight
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<blockquote data-quote="ntsqd" data-source="post: 2277596" data-attributes="member: 93138"><p>I'm not sure about that last sentence. The issue that I have with it is WHEN the core becomes separated. It has been witnessed to have happened after the bullet is at rest thousands maybe literally millions of times, but all that tells us is that it did happen and not when it happened. So did it happen in flight or did it happen as the bullet was coming to a stop?</p><p></p><p>I contend, as I first posted, that the jacket distortion due to the rifling is a serious impediment to the core rotating relative to the jacket while in flight. That jacket distortion will make the interior surface of the jacket not round, and that will make the exterior surface of the core also not round. That will make it much more difficult for them to rotate relative to each other while in flight.</p><p></p><p>As I also previously said, a thick jacketed bullet will distort it's interior surface lass than a thin jacketed bullet. However, it is the thin jacketed bullet that it likely to be going faster. There is the issue of jacket spring-back. I would expect the spring-back to create a tiny air gap between it and the core in a non-bonded core bullet. I would also expect a thin jacket to spring-back more than a thick jacket. This spring-back would be a good reason for core loss in a non-bonded bullet at the terminal end of the bullet's flight as the core is now loose in the jacket but that does not mean that it was necessarily free to rotate relative to the jacket.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 2277596, member: 93138"] I'm not sure about that last sentence. The issue that I have with it is WHEN the core becomes separated. It has been witnessed to have happened after the bullet is at rest thousands maybe literally millions of times, but all that tells us is that it did happen and not when it happened. So did it happen in flight or did it happen as the bullet was coming to a stop? I contend, as I first posted, that the jacket distortion due to the rifling is a serious impediment to the core rotating relative to the jacket while in flight. That jacket distortion will make the interior surface of the jacket not round, and that will make the exterior surface of the core also not round. That will make it much more difficult for them to rotate relative to each other while in flight. As I also previously said, a thick jacketed bullet will distort it's interior surface lass than a thin jacketed bullet. However, it is the thin jacketed bullet that it likely to be going faster. There is the issue of jacket spring-back. I would expect the spring-back to create a tiny air gap between it and the core in a non-bonded core bullet. I would also expect a thin jacket to spring-back more than a thick jacket. This spring-back would be a good reason for core loss in a non-bonded bullet at the terminal end of the bullet's flight as the core is now loose in the jacket but that does not mean that it was necessarily free to rotate relative to the jacket. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
is copper jacket spinning around lead core during flight
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