My nice CMPicon barreled receiver has not been running right from the very start. I have finally figured out the chamber is the problem. I think I need a finishing reamer or perhaps a nice buff job on the chamber. Ejected brass has scars on the shoulder and I think the chamber may well be pitted? scared? etc? Any suggestions, please. I have the tools to jerk the barrel off, so is that next? Thanks guys.
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