when I had a go with the crosman 357, I cleaned the barrel then chronoed it (it was over 7 years ago so I canot remember the power) I do remember that it was a hot day and I was shooting at a standad 10m air pistol target, I was shooting at a steady pace using a 2 handed stance, I got nearly all shots in the black (i called a few flyers) I put 10 on each target and saved then to show the owner, the person acting as range control officer witnessed the shot count and he commented that it was pretty consistent to get the groupings I was getting.