BTW i forgot to mention. 120 grains Triple 7 is an overload and thats the reason the powerbelts scatter. triple 7 is 15-20% more powerful than pyrodex rs or blackpowder, Thats why thet started grouping better when you dropped them down in the 100 grain range. Im still learning with my rifle and triple7. I'd honestly switch to pyrodex RS if you're going to shoot powerbelts or conicals. Pyrodex seems to do the best with an all lead bullet like the buckslayers.