Correction --- It was at 40gr of 4895 IMR (not 41gr), I was getting 3 out of 5 rds with cratered primers, using CCI #34 primers, my COL was 2.780 with the Sierra 165gr HPBT Game King.
Also while reading NoFail's range test thread, seating depth and pressures came up.
So I thought I should come back and mention, my COL was 2.780, using Sierra 165gr HPBT Game King. For me groups start to open up as I go past that lenght.
Have not chronographed this load, but I'm thinking about 2450fps