I read an interesting article where the author stated that with the right powders and lighter bullets {150 gr.} the 308 winchester could actually have a lil more muzzel velocity than a 30-06 but where the 30-06 shines over the 308 is when you start driving the heavy bullets 200 gr. and up the and 308 just does not have enuff fuel tank to launch a heavy bullet with the same authority as the 30-06 and I see this same comparison between the 30-06 and 300 mag...........