First off the factory rifle usually has a 12 twist which wont stabilize a 77 gr bullet. Second, if you hit them with a 55 gr. bullet ( which it will stabilize) at 300 yards, it will kill him.
I’ve shot lots of them, a 50 grain ballistic tip out of a 223 is a coyote killer if you hit them correctly. That 50 grain bullet or a 77 grain won’t kill them quickly if you gut shoot them.
