I personally do not recomend aiming for the head, to many animals have there jaw shot off. A 22lr in the chest does just as much damageif not more then a 223, 222, or 22-250 FMJ that many use for vamint hunting. Let the argument start, the difference is velocity when you compair 22lr to the 223 fmj. Additionally the CCI stinger is not recomended, try yellow jackets.