There used to be a stray cat that came around my place and finally my parents told me to kill it so the first time i went out with my POWERLINE 856 which shoots .177s over 650fps and ambushed it and shot it in the head from about a foot. I thought i killed it but i saw it again a week or so later and shot it in the head from about 15 feet this time. and it still ran. So next time i used 3in. 00 Buck, that did the trick!