Thndrchicken is right. White tails are not that tough a critter to kill. Any "typical" center fire, medium game hunting round will certainly do the trick. The 30.06 Spr. cartridge is about as good as you could choose for hunting. What you need to do is try a few different loads to see which groups best out of your rifle. Just helped my hunting buddy, ER, set up his BAR in 30.06. Had 8 different factory ammos to try out. One would not group better than 4.5 MOA. Most were around 1.25 - 1.50 MOA. The "winner" was under 1 MOA. Which in my experience is outstanding for any mass produced hunting rifle - and a factory load. I just hope he could find more ammo in that same lot number.