When I was in high school Or shortly after the hmr was new! my buddy bought one in bolt action I belive. It was typical to skip class. or in afternoons, after school and days off to drive gravel roads here in minnesota. usually spring when grass was short to shoot 13 stripe gophers on road shoulders. I remember switching to hollow point in 22lr thinking, wow that was entertaning. would find the head and a piece of the body laying on the ground but when he got that hmr it brought a hole new pinkish red mist to the situation and at further distances that didn't really leave much left to find! A coon is bigger but I would think it would leave a big hole. I have used 22lr on coons in a trap, to dispatch. shoot them in the forehead to save fur, bullet don't come out. Unless you are looking for the visual effect of the hmr, I would think the 22lr would be sufficient under 40 yards.