I believe that air rifle, or any air-powered launching device, is dependent upon the quality of the pellets used. My break barrel .22 has its own needs for accuracy. 850 fps, or so, works best so I have to work around pellet weight and skirt design. Some work well, and others are not worth mentioning. Stability seems to be determined by ogive diameter, weight, skirt design. I would really love to work out the best possible combination with this machine!