I won't speak to the hornet, but I will speak to ranges. In my territory, coyotes usually sneak well within 200 yards before you see them. At least, before i see them.
I don't doubt at that range, just about any centerfire rifle cartridge will do the trick. I have a .270, and use a .270, but that's because it's currently my only centerfire rifle. The bigger the gun, the less you have to worry about whacking them in the perfect spot. However, the exit holes are not something that can be stitched.