If I shoot at 10 to 12 second interval, using 18.1 gr pellets, from shot to shot the groups are good (at 30 yards .06 to .178 CTC) with an ES of 3 to 5. I shoot 25.39 gr at 50 yards with good result but with a much heavier hammer hit. If I shoot the 18.1s and shoot fast, like for a good wind...