I shoot,either 120grs. loose T7,or 3 pellets,T7 or Pyrodex,with a 250gr. Shock/Wave. The gun loves these loads,and dosen't seem to care which you use. I shot a buck this year at 162yds,head on,and the bullet hit right on the money! I've shot 2 liter soda bottles,filled with water,at 200yds. and 250yds. It hits them,shot after shot. The 300 should be better at long range,but I can't see the diffrence in my gun. Ron