IMHO the term "mountain rifle" was cornered by Remington and was a marketing gimmick just as many others that we know of. I wonder just what they meant by that?.... "light weight" rifle perhaps? My mountain rifle is a 338 WM, because I hunt elk in the mountains, not because it is light (it isn't). My sheep rifle that I also use in the mountains is a .270WSM, not a heavy weight but not a light weight either. It also doubles as my antelope gun, my sometimes deer gun. My "lightweight" rifle is Ruger M77 Compact in 7mm-08, at 5.25 lbs, I don't think they get any lighter than that, but it is definetely NOT my mountain rifle because "ursus horibilus" lives in the mountains. Pick a lightweight rifle in a .338, you'll cringe every time you pull the trigger. This is not intended as a discussion on caliber choices or brand of rifles, etc. What I'm suggesting is that you decide how exactly you define the true "mountain rifle", durability? caliber? weight? And I wouldn't discount a certain gun just because it's a pound heavier than the next either.