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The Range
Ammo & Reloading
Foot pounds is not the end all... Calculations, Momentum and Taylor KO.
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<blockquote data-quote="Rod Snell" data-source="post: 2777633" data-attributes="member: 796"><p>In a collision where you are trying to knock something down, like steel plates or bowling pins, MOMENTUM (mv) is the relevant number. The Power Factor used in USPSA and IDPA is MOMENTUM in odd units. It is easier to double the size of a pistol bullet (.45 vs 9mm) than to double its speed.</p><p></p><p></p><p>When you are trying to penetrate, ENERGY is the relevant number.</p><p>A good illustration is hitting a steel popper with a 55gr bullet at 700 fps, with the result that the popper does NOT fall. Crank that same 55 gr bullet up to 2700fps and the popper still does not fall, but there is a hole through the steel. That's why there is a sign on the pistol steel range NO CENTERFIRE RIFLES.</p><p></p><p>The physics prof</p></blockquote><p></p>
[QUOTE="Rod Snell, post: 2777633, member: 796"] In a collision where you are trying to knock something down, like steel plates or bowling pins, MOMENTUM (mv) is the relevant number. The Power Factor used in USPSA and IDPA is MOMENTUM in odd units. It is easier to double the size of a pistol bullet (.45 vs 9mm) than to double its speed. When you are trying to penetrate, ENERGY is the relevant number. A good illustration is hitting a steel popper with a 55gr bullet at 700 fps, with the result that the popper does NOT fall. Crank that same 55 gr bullet up to 2700fps and the popper still does not fall, but there is a hole through the steel. That's why there is a sign on the pistol steel range NO CENTERFIRE RIFLES. The physics prof [/QUOTE]
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Foot pounds is not the end all... Calculations, Momentum and Taylor KO.
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