The best gun for moose and elk is a gun you can shoot well. Don't buy the biggest badest caliber buy the one you can shoot. If you have a 338 RUM or 375 RUM and can't handle the recoil you will never be able to kill anything very well with it. If you can shoot a 270 or 30.06 well, that gun will kill moose, elk and bears etc. If you can place the bullet in the right spot any gun will work.