I bought some once fired 308 brass once. I full sized them, wouldn't chamber. I ran them through a small base die, with a lot of resistance, still wouldn't chamber. The base of this brass was so stretched out even the small base die wouldn't push it back. New brass chambers fine.
Wayne, A buddy of mine chambered a 30BR for his brother. Brother sent him another blank for an extra 30BR barrel. Both chambered with the same reamer and Nez has a digital indicator to check head space. All measurements were the same, but he had to hit the bolt handle to extract the fired brass on the new chamber. Nez sent me a piece of brass fired in each barrel with only the primer being removed. I told him to mark them so that he only knew which came out of each barrel. I measured OAL, head space, shoulder diameter, and diameter above the extractor groove. Virtually no difference. Nez called back and said his brother had about 30 firings for ea. piece of brass. New brass fixed the problem.
