Why???? Only to add more bad storys?? One doesn't have to look very far to find plenty of bad storys on the internet involving the hmr! Which would be expected since it delivers less KE on target.
Sure, there's plenty of success storys with both calibers. BUT when the number of coyotes that you take gets over one, two or three a year, the odds quickly begin to lean to lost critters.
Make a marginal shot with either cal. and you'll loose that coyote.