I have the mountain stalker in .54 caliber and I get real good groups out to 50 yards. I load with .530 roundball, .010 patch, also use wonder wads and 80 grains of 777-ffg. When it warms up some I'm going to try some 380gr Lee R.E.A.L. conicals that I cast. With these I'll probably start off with 65 to 70 grains of 777-ffg and wonder wads.... :-)