If I were to move to Alaska (my Sister lives there, so at one time I was thinking about going) I would be happy with any of several cartridges. If I were to be offered an unlimited amount of bullets but just 1 rifle I would probably go with my 9.3X62 or my 375H&H. (flip a coin)
If I were limited to a 30-06 however I doubt I'd ever really find it lacking, again if I can use any bullets I'd want.
Of all the rifles I own now-days I'd be happy with my 270, my 308, my 30-06, my 300 H&H, my 8X57, my 358 Winchester, my 9.3X57 my 9.3X62, my 9,.3X74R or my 375H&H.
Of those I have owned in the past that would also feel fine with are the 7.5 Swiss, the 300 Winchester, the 308 Norma, the 300 Weatherby, the 338-06, and the 338 Winchester.
As long as I got to choose the loads I would be fine with any one of those listed above. Shoot any of those well, and use a good bullet that doesn't blow up easily and you can kill any game in Alaska you need to.
