Just got done measuring my Gamo Whisper Cat ballistics with the chronograph - it came in way under what I was thinking. It's amazing I've had any success against the squirrels, considering these stats are taken from the muzzle.
10-shot string, Gamo Whisper Cat
Load: Crossman 10.5gr Round Dome, .177cal
Lo: 643fps, 9.63ft-lb
Hi: 680fps, 10.77ft-lb
Av: 656fps, 10.03ft-lbSo I've got about a 10% energy variance (a whole foot pound, sigh) from low to hi. At least it does the job with a well-placed shot by the ear, but it sure doesn't leave much room for error.I had been estimating 16ft-lb, so, I was way off. Goes to show just how fudged the advertised numbers are...
10-shot string, Gamo Whisper Cat
Load: Crossman 10.5gr Round Dome, .177cal
Lo: 643fps, 9.63ft-lb
Hi: 680fps, 10.77ft-lb
Av: 656fps, 10.03ft-lbSo I've got about a 10% energy variance (a whole foot pound, sigh) from low to hi. At least it does the job with a well-placed shot by the ear, but it sure doesn't leave much room for error.I had been estimating 16ft-lb, so, I was way off. Goes to show just how fudged the advertised numbers are...