RE: best gun for moose and bear
It's really pretty simple...Your .270 would handle anything up to the big bears...
If you want more punch, consider this...The .300 mags kick nearly as much as the .338, andis considered MINIMUM by many guides for grizzly..
If I were you, I'd buy a .338 and use it for everything.. You may not need it for caribou and moose, but you may need it for what comes AFTER your caribou or moose after you shoot it..
I'm no authority on AK hunting, but I've done 6 DIY hunts up there..I started out with a .280 Rem, and it worked fine on caribou and moose..
After seeing a couple dozen of those "hairy Volkswagons" rambling around up there, I decided itmight be prudent to carry a heavier rifle..
My current Alaska rifle is a 9.3 x 62, which is roughly equivalent to a .338, at least within 250 -300 yards..