I have a S&W 586 pellet pistol with 6" barrel and it is quite accurate and has a nice single action trigger but the double action in not that great and has a lot of stacking. The .177 pellet at 450 fps is a lot more deadlier on squirrels than a BB and I have 5 ten shot clips(?) which allow for fast reloading, and after I shoot 50 rounds I change CO2 cartriges.