I shot lots rounds to day 3 fail to spark changed flint . I shot 10 444 power belts with 75 gr 2f and 80 fr 3f all placed within a 3 inch group at 50 yds. I than went to the mmp 50 cal sabot and a remington 350gr 50 cal bullet hollow point. I shot at least 20 of these with no group bigger than 3 inches also with 75 gr 2 f. The last group was a quarter size 3 shot group basicallly in one hole. I shot these with my Lyman Deer stalker 1x48 54 cal. I don't know what I did right but this is a very good shooting rifle. The sights were RMC rear v peep and Lyman red glow front sight. I am good to 100yds I think and the combo groups under 4 inches over all.