Like most, I would assume it was shot by a hunter, but there are other possibilities. It is sad to think, but there are folks who would throw led at something that they believe is being a nuisance around their place, or someone(s) just doing it for the thrill of shooting at something, stupid yes, but not unheard of. No need to debate a 243 on moose, most ethical hunters know it is not a caliber to rely on for heavier game. There will always be some that disagree.