Same thing happened to me at 240yds 2 years ago on the first shot with 60 gr Hornady 's with some frags in the lungs. Hit high on the second shot in the neck down she went. Half way out to the doe she started to get up and I had to shoot her again. The same shot as the first with a 243 would have put her down and out on the spot. I don't use the 223 on antelope anymore anyone else can do as they like. MB
