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Rifles, Reloading, Optics, Equipment
Reloading
A Real Head Scratcher-30-06 Headspace Issue
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<blockquote data-quote="MagnumManiac" data-source="post: 2111626" data-attributes="member: 10755"><p>I have a 25-06 that is .002" below minimum SAAMI spec. New cases only just fit.</p><p>However, no case after firing comes out shorter in head to datum. This is measured with an RCBS Precision Mic.</p><p>I believe these give the best actual measurement when used on a tight fitting case of your chamber dimension.</p><p>I also have the Hornady set, the 2 do not give the same measurements.</p><p>I would fire the same case 3 times with only neck sizing it and see what happens. If it shortens, this is a dead giveaway that there is insufficient pressure to obturate the brass. Reduced loads increase headspace over multiple firings, this can cause bad things.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2111626, member: 10755"] I have a 25-06 that is .002” below minimum SAAMI spec. New cases only just fit. However, no case after firing comes out shorter in head to datum. This is measured with an RCBS Precision Mic. I believe these give the best actual measurement when used on a tight fitting case of your chamber dimension. I also have the Hornady set, the 2 do not give the same measurements. I would fire the same case 3 times with only neck sizing it and see what happens. If it shortens, this is a dead giveaway that there is insufficient pressure to obturate the brass. Reduced loads increase headspace over multiple firings, this can cause bad things. Cheers. [/QUOTE]
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Reloading
A Real Head Scratcher-30-06 Headspace Issue
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