Forums › Forums › General Discussion › Fussy About Once-fired Brass › Re: Re: Fussy About Once-fired Brass 37L1 Member March 13, 2017 at 2:22 pm 1 Bullseye Check the area of the problem cases near the case head with calipers. Compare that to a new, unfired case. It could be that the brass is expanding in that area causing your chambering issue.
