When headspacing, be sure the bolt head is not bottoming out on the barrel before the go gauge bottoms out in the chamber. I just went through this with a bolt head change. The breech face of the bolt was deeper than the factory head.
When headspacing, be sure the bolt head is not bottoming out on the barrel before the go gauge bottoms out in the chamber. I just went through this with a bolt head change. The breech face of the bolt was deeper than the factory head.
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