The boss swiped our dept. issued shotguns and all I have left is my 45acp and my AR. I've never hunted or shot an animal on purpose other than the 12ga, but I'm told that the 223 is a crap round for putting down injured deer on the side of a roadway. I'd like something that can do it quickly in as few shots as possible. If there's really nothing out there, I can try the .45. This came up last night and as I arrived on scene the doe kicked the bucket, saving me the trouble, but my Sgt. had no clear answer.