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Hunting
Long Range Hunting & Shooting
Effect of Bullet Spin on Terminal Performance
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<blockquote data-quote="GMFWOODCHUCK" data-source="post: 1695050" data-attributes="member: 110748"><p>This is all stuff that's been tested on there Aberdeen Testing grounds. It's not theory. There's a strong science behind it. The army using non spinning flachettes in it's smoothbore tank guns isn't done on accident. Less rotations = less expansion = more armor penetration. Their 6 inch bolts aren't capable of penetrating 6 meters (yes, 6 meters) of hardened steel because someone happen chanced it. It was carefully planned and designed.</p><p></p><p>That said, the science isn't understood by most of us. Most of us aren't dynamic engineers and therefore aren't going to know the math. And nor is it needed to be known. All you need to know is that the faster the rotations the faster the expansion. There's a reason why they tell you not to use 22 hornet bullets in 22-250s with a fast twist. They come apart in flight before going very far. So obviously that will have an effect on a woodchuck versus one spinning quite slowly.</p><p></p><p>The easiest way to understand it is with a kid's ride. The faster you spin the harder it is to hang on.</p></blockquote><p></p>
[QUOTE="GMFWOODCHUCK, post: 1695050, member: 110748"] This is all stuff that's been tested on there Aberdeen Testing grounds. It's not theory. There's a strong science behind it. The army using non spinning flachettes in it's smoothbore tank guns isn't done on accident. Less rotations = less expansion = more armor penetration. Their 6 inch bolts aren't capable of penetrating 6 meters (yes, 6 meters) of hardened steel because someone happen chanced it. It was carefully planned and designed. That said, the science isn't understood by most of us. Most of us aren't dynamic engineers and therefore aren't going to know the math. And nor is it needed to be known. All you need to know is that the faster the rotations the faster the expansion. There's a reason why they tell you not to use 22 hornet bullets in 22-250s with a fast twist. They come apart in flight before going very far. So obviously that will have an effect on a woodchuck versus one spinning quite slowly. The easiest way to understand it is with a kid's ride. The faster you spin the harder it is to hang on. [/QUOTE]
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Effect of Bullet Spin on Terminal Performance
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