I have concluded that this combo will not work for me. If any one have had succes with this GOD BLESS YOU....@56gr I shoot 3030fps. Published is 3330..Wow what a difference. I know it's gas operated but WOW.. I loaded F/ 52 - 56gr in 1 grain increments with COL@ 3.18 and all were 300fps lower than published. Best load was 54gr REL 15,125gr BT,REM 9.5 primer,Nosler brass, @2910FPS... spread is calculated with bullet diameter subtracted.