Not hunting, but over the years I killed mule deer when I was on-duty, with my 223 AR-15 & soft-point 55 gr Federal ammo.

I was a cop, and pretty much every winter we'd get reports of injured or sick deer in town. Hit by cars, trucks, even the train. Chased and injured by domestic dogs. Hung up in fences, etc... They'd come into town during the winter, and it isn't a good place for deer. That danged train hit a group of four mule deer that were on the tracks on the outskirts of town, apparently trying to stay out of the deep snow. Killed three of 'em, broke the legs of all, including one that was injured and couldn't flee at my approach.

Most of the shots were pretty close, a couple were as far as 50 yards or so. Only one young buck required a second shot, everything else just fell, dead.

I found it interesting, but sad duty.

Guy