I don't know where some of you people come up with silly statements like this. I mean really!
I shot, and killed an elk last fall at 500 yards with my .308. But then, I do practice at distances from 100 to 700 yards regularly all summer long and know my rifle very well.
If you need a magnum of any kind to hunt then I suspect you're a lousy shot and you should really concentrate on spending more time at the range.
Don't get me wrong, I understand wanting to own, shoot and hunt with a magnum.....I like big bores too.....but to say you have to use a magnum at distances over 300 yards is just plain ridiculous.
Oh and I voted .308 although I'd say either that or a 30-06 would be my preference.