I shoot winchesters BB’s in a 3 1/2 inch or rem hyper velocity rounds which are new last year those are 3 inch BB’s both pattern well in my gun. I would buy a couple diffrent boxs and test them. but if you dont have time go middle of the road on price and go from there. i have bought expensive rounds and not had very good luck with them. Best of luck with your choice, we have been out everyday and had great luck so far.