Loaded up the Optima with Two T7 Magnum Pellets and the 250gr Thor. First 2 shots high right, scope adjustment and 3 more shots did great. On shot 5, due to the hard crud ring, i was pushing on my range rod and i felt a pellet break. Im not sure if thats what caused the group to open or what, but that T7 crud ring is a pain in the butt to get through. Its good to see though that the Optima and Thor do very good well a magnum charge.