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Rifles, Reloading, Optics, Equipment
Reloading
0.03" growth after first fire (264WM WW Brass)
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<blockquote data-quote="XSIVSPD" data-source="post: 2044952" data-attributes="member: 98308"><p>One thing to keep in mind is that most cartridges headspace off a datum point somewhat centered on the angled portion of the shoulder. If the virgin brass has a shallower angle it may still headspace properly (even at the shoulder since we're talking about cartridges that headspace off the belt), but it will be moving the shoulder forward. </p><p></p><p>At that point its doing basically the same thing that an AI chamber would do, just less extreme. Many people measure for headspace issues by measuring to the start of the shoulder since the datum point is hard to measure to without specialized gear. If that's what the OP is doing then it could easily show 0.030" worth of movement with changing the actual headspace much at all</p></blockquote><p></p>
[QUOTE="XSIVSPD, post: 2044952, member: 98308"] One thing to keep in mind is that most cartridges headspace off a datum point somewhat centered on the angled portion of the shoulder. If the virgin brass has a shallower angle it may still headspace properly (even at the shoulder since we're talking about cartridges that headspace off the belt), but it will be moving the shoulder forward. At that point its doing basically the same thing that an AI chamber would do, just less extreme. Many people measure for headspace issues by measuring to the start of the shoulder since the datum point is hard to measure to without specialized gear. If that's what the OP is doing then it could easily show 0.030" worth of movement with changing the actual headspace much at all [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
0.03" growth after first fire (264WM WW Brass)
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