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Old December 12, 2019, 02:43 AM   #46
stagpanther
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Join Date: March 2, 2014
Posts: 6,775
Quote:
I'm a little confused there.
Is he saying people are reaming significantly deeper than 1.710" case mouth stop?
What I understood is that between the chamber's headspace datum (mouth) and the face of the bolt the specs allow for headspace that is in excess of what you might typically find for a bottleneck AR cartridge (I don't recall any DI AR build I've ever done exceeding .005 to .006 without a no-go gauge closing). I've heard that there are several different reamers "out in the wild" so that (my interpretation) could possibly be a contributing factor; I ran into a similar variations issue (unrelated to headspace) when I jumped on the 224 valkyrie bandwagon early on in that there was some variation in the reamers manufacturers were using which made it difficult to sort out "what's what."
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Last edited by stagpanther; December 12, 2019 at 02:58 AM.
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