Def buy .243 Win. that is a hot little round that has no problem piling up deer. I bought my wife .243 and she never shot a gun except for her hunting course when she was 14 (now 25) and put a 3" group of 3 rounds at 300 yards. All she needs to do is put the corsshairs on the deer from 10 yards to 300 yards and pull the trigger. It is an awesome little cartridge and has no problems taking a deer.