The 06 will handle heavier bullets than the 7mm' s.
True enough, but the sectional density arguement comes into play. A 175 grain 7mm bullet in theory will penetrate better than a 200 grain .308 bullet due to its superior sectional density. In reality I think it is six of one and half a dozen of the other. If it was me and I was looking for a new rifle to hunt deer up to moose I would probably pick a 280 Rem.