I shoot a .50 cal Encore and I shoot the max load of 3x50 Pyrodex pellets pushing the 250 grain T/C Shockwave Bonded (blue tip) bullets in the black sabot. I use the VariFlame with Federal small rifle primers and when I made the change my groups at 100 yards went from just under 3 inches to < 1 1/2 inch at 100 yards. That made me a beliver!