I bought that same ML a month and half ago- Mine shoots the best with the Super Glide ShockWaves 250g with 777 pellets-I get identical groups with 130 and 150 g loads so i shoot the 150. This is the best pellet powder set up I have come across-And I do get suprisingly tight groups 3 shots in a copecan circle-you put on a scope you should be able to do at least that good