I owned a .338 winnmag for around 20 years and used it on several moose, a couple deer , black bears some caribou and even a timberwolf who was stalking me while I was calling moose. There is no doubt that the .338 is Ideal for Alaska. A moose is enormous compared to a deer and those who have not hunted them are usually shocked when they encounter one but they are also easy to kill. A 30-06 is really plenty of rifle for moose. The advantage of the .338 is you might just see a huge bull walking away from you and with an 06 thats not an ethical shot. I have shot bull moose in the fart vent and have the bullet break a front shoulder and exit the front of the moose, result being one very dead moose. The other thing is if I was anywhere near a grizzly bear then I would not consider anything less than a .338 mag ! If you can shoot it well the .338 is a great round. But my experience is lots of people develop flinches when getting to that level of recoil. I myself had a muzzle brake on mine which is why I sold it. Just not worth the hearing damage to me. Beautiful round though.