The .300 win mag will not let you down it definitely will have the power over the 7mm although it may not shoot as flat. The 300 will take the deer, elk, moose, black bear hell you could even take a grizzly with the good shot and right load. Although the 300 has a bit of a kick a 30-06 is a good second option, i am definitely a fan of the 30-06 it would also take any game in north america plus shoot past 800 yards on a target, as far as accuracy goes i normally make a 500 yard bulls-eye with my stevens 30-06 (stevens is a economy version of Savage).