My wife and I went to Academy Sports Sunday night as we were out buying Christmas and I always have to stop by there. I was looking the the guns and noticed a box way down at the bottom that had a sale price of 89.88. I asked the guy at the counter what it was and it was a single shot Rossi bull barrell in 223 caliber. It had the sling mounts and scope rail on it and felt great so i picked it up for my 11 year old son for Christmas. My question is can he kill a deer with it? I have hunted with a 30-30 and 30-06 all my life and bought my wife a 243 last year and just want to make sure I am comfortable with him shooting deer with it. What bullet should I use....you guys that shoot 223's let me know.