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Sizing die is all I can think of. Just started loading for .270 - rifle inherited from Dad - new brass, new RCBS dies.
As mentioned, I'm camming the ram over & full-length sizing much as the thing'll do.
Problem goes away when fire-forming.
Must be some eccentricity betwixt the die & the chamber. When the right (wrong) condiitions match up, I get that small interference.
Doesn't seem to be all that big of deal - everything still chambers - but kinda bugs me. I wanted to throw together some antelope loads & wanted fully sized, no hassle in chambering rounds.
Guess I'll sort 'em all beforehand & use the smoothies for hunting & the stcklers for sighting in. Maybe send the dies back after The Hunt.
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