"walterga, i want to go hunting over by you, 275 # whitetails ?"
I don't hunt deer, but we do have some pretty large deer hereabouts. Lots of row crops and good cover for deer. Killing a deer doesn't require a great deal of skill, at the ranges at which most deer are killed. If deer hunting were very difficult, those 8-yr-old girls, shooting SKS's couldn't kill them so easily.
A .223 has much more energy than many handgun rounds that people use for deer hunting.
I do believe that 19 non-running deer, shot from a stand is doable. Also believe that the same results would have been had with a good .243.