I use Air rifles .22 cal. 14 to 20+ grain pellets at 800-1000 fps. Head shots for coons ( they tough rascals) very little noise vs powder burners. CB longs in a .22 pistol ( single shot) are pretty quiet also good for 25 yards or so, again head shots. Coyotes are becoming a bigger problem than the coons and chipmunks, and getting very bold, one by itself I do not worry much about, but anything more is a problem requiring remediation.