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Old March 1, 2012, 09:36 PM   #3
Bill Daniel
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Join Date: February 10, 2000
Location: Bowling Green, KY.
Posts: 518
Headspace on a barrel switch

Let me ask the question in a different way. The difference between a go gauge on the Win 308 and the nogo gauge is 0.004". When I rebarrel my bolt action I will tighten the barrel to the action on the go gauge then back off "a bit" remove the gauge and make sure the bolt will no close on the nogo so that I know the head space is less than 0.004" over the go gauge. Will my brass last longer if the head space is less than 0.003" or less than 0.002" or less than 0.001" over the go gauge? The 0.004" difference to keep me from setting too tight of a chamber and crushing the shoulder of a round vs too long a chamber that will lead to excess stretch and early case head separation. Will 0.002" be adequate for the above and net me longer case life?
Thanks,
BillobviouslynotagunsmithDaniel
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