.308 is virtually identical to the 30.06 and even has a bit better ballistics with certain loads up to 165 grain. That is where the 30.06 starts to seperate itself from the .308. The .308 is pretty much limited to 180 grains or less, where the .06 can go as high as 220 grains which gets you some better performance on bigger game. I myself shoot the .308 better, at least with the guns that I have shot the 2 in, but then again I much prefer lighter recoil.