I have two beemans in 177,spring piston,one shoots 700 fps,and the other 1000 fps,most of the time I had to have a fallow up shot on squirrel,got a crosman 22 cal. with the new nitro piston,shoots about 900 fps,if I do my part its usually a one shot kill,and the good thing is if I cock it in the morning it will shoot to the same point of aim that night.