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Rifles, Reloading, Optics, Equipment
Reloading
How to measure chamber depth to seat bullets?
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<blockquote data-quote="Bart B" data-source="post: 684498" data-attributes="member: 5302"><p>Note that the exact distance you want the bullets to jump to the lands will vary a few thousandths for several reasons.</p><p></p><p>One's the fact that all bullets whose front half is formed by the same pointing die will have slightly different shapes. The diameter where the bullet first touches the rifling will vary up to a few thousandths across a box of bullets.</p><p></p><p>Another's the fact that bottleneck cases headspacing on their shoulders will have a small difference in their head to shoulder measurement; typically a few thousandths. Which means when they're fired with their shoulder hard against the chamber shoulder, the bullet will be different distances off the rifling even if the case head to bullet contact to rifling point's exactly the same.</p><p></p><p>All of which means that with some cases and bullets combinations, they may be several thousandths spread in the distance bullets jump to the rifling. But that's usually not a problem.</p></blockquote><p></p>
[QUOTE="Bart B, post: 684498, member: 5302"] Note that the exact distance you want the bullets to jump to the lands will vary a few thousandths for several reasons. One's the fact that all bullets whose front half is formed by the same pointing die will have slightly different shapes. The diameter where the bullet first touches the rifling will vary up to a few thousandths across a box of bullets. Another's the fact that bottleneck cases headspacing on their shoulders will have a small difference in their head to shoulder measurement; typically a few thousandths. Which means when they're fired with their shoulder hard against the chamber shoulder, the bullet will be different distances off the rifling even if the case head to bullet contact to rifling point's exactly the same. All of which means that with some cases and bullets combinations, they may be several thousandths spread in the distance bullets jump to the rifling. But that's usually not a problem. [/QUOTE]
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How to measure chamber depth to seat bullets?
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