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Rifles, Reloading, Optics, Equipment
Reloading
Headspace Variance
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<blockquote data-quote="boomtube" data-source="post: 401827" data-attributes="member: 9215"><p>"How can that be? Shouldn't it be much tighter than that since it's fire forming to a chamber?"</p><p> </p><p>Ideally, yeah. But we don't live in an ideal world and our cases are for sure not ideal. Actually, what you're getting is pretty consistant! All that tiny difference reflects is slight variations in the metal alloy. The molten metal mixture does vary somewhat and stray soft spots in the final product will stay expanded better than harder spots. And it will get slightly different as you take them thro a few cycles and it hardens even more.</p><p> </p><p>There is no point in moving the shoulders back any further than they are now, they have already shrunk back a tad more than full chamber size. You WILL decrease case stretch if you leave them (neck sizing) or restore them (FL sizing) to where they are now.</p></blockquote><p></p>
[QUOTE="boomtube, post: 401827, member: 9215"] "How can that be? Shouldn't it be much tighter than that since it's fire forming to a chamber?" Ideally, yeah. But we don't live in an ideal world and our cases are for sure not ideal. Actually, what you're getting is pretty consistant! All that tiny difference reflects is slight variations in the metal alloy. The molten metal mixture does vary somewhat and stray soft spots in the final product will stay expanded better than harder spots. And it will get slightly different as you take them thro a few cycles and it hardens even more. There is no point in moving the shoulders back any further than they are now, they have already shrunk back a tad more than full chamber size. You WILL decrease case stretch if you leave them (neck sizing) or restore them (FL sizing) to where they are now. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Headspace Variance
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