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Rifles, Reloading, Optics, Equipment
Reloading
5 or 3 shot group when determining ES/SD???
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<blockquote data-quote="Bart B" data-source="post: 625783" data-attributes="member: 5302"><p>I don't know that my bullets leave at the top of their whip cycle, or TDC. I nor anybody else I know of has the test equipment to show where in the barrel whip cycle a bullet leaves. It's all theory by those who promote it and none of them can prove it.</p><p></p><p>Bullets leaving at TDC (or thereabouts) is not best for accuracy. I want them to leave while the barrel's bore axis at the muzzle is still swinging up so the slower ones start out at a greater angle and those faster at a lower one. As most barrels don't reach TDC before the bullets leave, trying to do so is difficult. Barrels whip mostly such that they go through one cycle in .010 seconds or less; that's 100 cycles per second or a very low frequency. Barrel time for most centerfire bullets is .0010 to .0015 seconds; they're long gone before the barrel completes one cycle of whip and they leave while the barrel's bore axis is moving upward.</p></blockquote><p></p>
[QUOTE="Bart B, post: 625783, member: 5302"] I don't know that my bullets leave at the top of their whip cycle, or TDC. I nor anybody else I know of has the test equipment to show where in the barrel whip cycle a bullet leaves. It's all theory by those who promote it and none of them can prove it. Bullets leaving at TDC (or thereabouts) is not best for accuracy. I want them to leave while the barrel's bore axis at the muzzle is still swinging up so the slower ones start out at a greater angle and those faster at a lower one. As most barrels don't reach TDC before the bullets leave, trying to do so is difficult. Barrels whip mostly such that they go through one cycle in .010 seconds or less; that's 100 cycles per second or a very low frequency. Barrel time for most centerfire bullets is .0010 to .0015 seconds; they're long gone before the barrel completes one cycle of whip and they leave while the barrel's bore axis is moving upward. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
5 or 3 shot group when determining ES/SD???
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