I was using regular old hornady 17gr. v-max, not the best choice for the situation, since I havent tried any other bullet weights or types. This is the second coyote I have killed with a 17, the other one was a chest shot at about 80yds, and he ran like a heat shot whitetail for about 50yds, and then piled up. Just gotta make sure and hit em right the first time. About the distance 40 yds, is not that rare for me, I live in New Mexico and hunt a lot of wide open spaces, but I always wear full camoflauge, from head to toe. I find a placed where I can bury myself in a mesquite bush or cedar tree, I blend right in, and they can't see me. Also, since it is so open, i can usually see a dog coming in from quite a ways out, giving me time to get my rifle ready and move if needed...