RE: 7MM's in Alaska
The 7 Mag has plenty of punch for moderate range on large game and long range on deer sized game. Choose your ammunition to fit the game and situation you will be hunting. 175 gr. partitions or other heavy jacketed bullets will do the job nicely. Shot placement is the key though. Be patient and wait on a good shot.
Personally, I would prefer my Browning .338 A-Bolt, but the 7 mag will do great things also.