I really appreciate all the input. It's been helpful. I don't have the funds necessary to buy a new hunting rifle or do a 458 conversion so I'm gonna stick to the 223 for now. I've always liked hornady ammo so i will check out what they have to offer for a good deer dropper. My AR is a M4 with a sbr upper with legal length flash suppressor. I haven't been able to find the markings to know who made it so I'm not sure what the twist is on it. All my shots will be made under 150 yards so I'm not worried about shot placement as I am efficient within that distance. Anything past that with a red dot sight and I'm blind.