The head shot is the worst possible percentage shot you can make. To small a target, way to much fringe area to hit and wound on that hens egg size target. Move that dot low left, right behind the shoulder, and that coyote will fall down every time....no matter if it's a 17 HMR or a 22-250.
There is a kill zone the size of a large grapefruit behind the shoulder(heart/lung), thats where the red dot should be, Im not sure why fellas promote the head shot, buts it's a poor choice.
Ive taken 16 coyotes with my Ruger 77/17, and only once, accidently, shot one in the head. The rest, were all shot in the lungs, and they either went down right now, or sprinted only a short distance before cartwheeling, similar to shooting them in the lungs with any other cartridge. My advice....stay away from head shots, they are risky, and really foolish, when a much larger kill zone is available.