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Guffey, if you're asking me if I think his headspace is .005", then no; I don't think that. I don't think he thinks that either.
I think his sized case headspace, not the barrel's chamber headspace, is .005" less than the standard (SAAMI GO gauge headspace spec) for his cartridge. I've no idea what his barrel chamber's headspace is but it's probably a thousandth or more longer than one of his fired case headspace measurements relative to the Mic reading on one.
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