280Rem,
I have had the same thing happen on a number of occassions. It was always rectified by lubing the cases very well, and then full-length sizing them with the die set to bump the shellholder hard, or "overadjusted" as suggested above.
There must be plenty of lube on the cases. Don't worry about the hydraulic dimples you get. They will iron out on the first firing. <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />
Ted
