Whatever the 06 can do the 7 mm Mag can do just as well or maybe a little better. .
I will agree the 7mm Mag can fire the same weight bullet at the same speed as the 30-06 with MORE powder ! And a couple less rounds in the magazine.
The 7mm mag is a great round, and due to the fact that there a a number of great 7mm bullets, it may have a little benefit in long range shooting. But if both rounds are loaded to equal velocities with similar bullets the difference is minimal.
It just never caught on in Alaska as well as it did in the lower 48.