Problem at the reload bench, difficult chambering... case needs trim, or it was not having the shoulder bumped back enough...
Mike the unfired case and compare dimensions to the once fired...
you can also Over Bump the shoulder back and have it buckle or bulge a little, and that can cause the same problem....
Should be a simple fix.....
I had two thoughts on this, I think the once fired brass may have been fired in a sloppy chamber however when I go to full length size it I’ve adjusted my die as far down as possible being careful not to buckle the shoulder and it still is hard chambering
