Quote Originally Posted by chuckindenver View Post
i thought about this...if you have rifling marks in the cases, then chances are you went too deap..looking at your cases you have pictured, looks like you may have an issue with the reamer, never seen a case that had milling marks in them...
maybe shoot a factory round, i found that remington cases work best for test fire. they run smooth, and dont have the machine gun crimps.
I certainly can't discount a problem with the reamer since it is new, but I doubt I went too deep. The go gauge only just closes fully and the bolt lug only comes about 75% of the way closed on a nogo.

Now that you mentioned machine gun crimps, I went back and carefully inspecting some unfired rounds from the same box as the previously posted casing. Now that I look more closely I can confirm they do have faint crimp marks around the case mouth in the same 6-way pattern. Guess we can discount that as being part of the problem, especially since there are no similar case-mouth marks on cases from the Peruvianicon ammo that I fired at the same time. Both sets of brass do however show the same rings around the middle to rear areas, and rim damage is much worse on the Peruvian vs the commercial ammo. At this point I'm almost certain that those tool marks need to go away.