Just what are you trying to accomplish exactly? There are very few places in the US where you can really stretch the legs of a magnum rifle.
If I had to start it all over again, I'd go with a 260 Rem heavy barrel Savage launching 140gr Nosler Custom Comp bullets. I went the 308 Win to 300 Win Mag, then I sold the magnum as I really couldn't stretch it's legs the way it was meant to be shot. Shooting a magnum at 200 yards because the base commander won't open up the 1000 yard national match range is...frustrating.
Then I PCS'd to a place where the 1000 yard range is open one weekend a month, and I had no magnum to shoot. Can't wait for next years High Power season to start off.
Machine guns are awesome until you have to carry one.