It will actually out shoot my RL25 load for 300 rum with 200 gr Accubond. Its about 100 fps slower and the group size with RL25 is small to begin with. I'd not hesitate to use it if my supply of RL25 dwindles...which it could. I'd start with starting load just to see where you are with velocity compared to what your supposed to get and start working my way up in charge weight until you get to your target velocity (as listed) (+ or - for difference in bbl length) or your gun tells you when enough is enough ie--pressure signs. Accuracy came in for me as I approached the upper end not right at it.