As much as I like my .25 cal PCP, you can pretty much duplicate it's ballistics (31 grain pellet @ 800 fps)with a CCI .22 Long CB load....29 grain bullet @ 710 fps. The CCI .22 LR Quite load is a 40 grain bullet at 710 fps. If it's too dangerous to use those, then it is for the airgun also. Any of them will be head shot only if you want them DRT.