I would buy a 7mm Remington Mag, It's just about the most versatile production cartrage around, good for Deer, Elk, Moose, Bear or whatever you want and the ammo is easy to find at any wallmart or remote store way up in the sticks in Alaska. It's the most popular magnum cartridge to date for good reason, it's bullet selection is terrific and the ballistic coefficient of the .284 bullet is hard to beat along with super flat shooting trajectories make it an ideal choice for long range hunting with lots of knock down power well past 500 yards. I would choose the 7mm Rem Mag over the 270 all day long.