I use the Gamo "Hunter" .177 cal pellets - theycome in the green tin. With the Gamo 220 Hunter rifle, I can shoot 1 inch groups at 35 yards. I've taken rabbits and squirells with them - all down within 10 yards of the shot. I've also killed a huge racoon with them, but it traveled 500 yards and expired in a creek. Did find him until the next morning.