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Rifles, Reloading, Optics, Equipment
Reloading
6.5 cm lapua brass- ever seen this?
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<blockquote data-quote="MagnumManiac" data-source="post: 1492816" data-attributes="member: 10755"><p>There is ONE, AND ONLY ONE cause for incipient case head separation and that is excessive headspace from a gun problem or induced by over sizing the brass.</p><p>High pressure loads do not cause this, trimming the brass is caused by this excessive brass working, nothing else.</p><p></p><p>I try not to move my brass cases more than .0015" in ANY direction, including the case body, not just the shoulder.</p><p></p><p>I bet if you reduce the amount you are sizing AND remove the expander from your die, I would suggest having Forster measure your die neck and measuring your LOADED brass and get the neck honed to .0015"-.002" under loaded round spec, I bet if you have this done your problem will go away.</p><p>Expanders can drag the shoulder forward, then you adjust the die to compensate, then the brass hardens and resists the sizing, causing excess headspace without you realising it.</p><p></p><p>Cheers</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1492816, member: 10755"] There is ONE, AND ONLY ONE cause for incipient case head separation and that is excessive headspace from a gun problem or induced by over sizing the brass. High pressure loads do not cause this, trimming the brass is caused by this excessive brass working, nothing else. I try not to move my brass cases more than .0015” in ANY direction, including the case body, not just the shoulder. I bet if you reduce the amount you are sizing AND remove the expander from your die, I would suggest having Forster measure your die neck and measuring your LOADED brass and get the neck honed to .0015”-.002” under loaded round spec, I bet if you have this done your problem will go away. Expanders can drag the shoulder forward, then you adjust the die to compensate, then the brass hardens and resists the sizing, causing excess headspace without you realising it. Cheers [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
6.5 cm lapua brass- ever seen this?
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