Tried some 100 gr sierra SP wednesday and didn't get them to shoot 2 good,picked up a box of the sierra match in 100 gr.Shot 11 different loads today with them and 10 groups out of the 11 were under an inch at 100 yds.The best powder so far was R-25 and Imr 3031.Want to try some R-19 and R 22 next time.Below is the four best groups,think it did pretty good for a new rifle.