A mountain rifle is NOT suppose to be heavy - that's why it's called a mountain rifle !
Weatherby is a very fine manufacturer and their firearms are extremly well built, but I just brought the X-bolt Stainless stalker in .338 win mag for mountain hunts.
http://www.browning.com/products/cat...35&type_id=202
At the range, out of the box, with factory ammo, off sand bags - 1" MOA.
BTW - I'm 5'6" 160lbs.
Not for nothin'..........................Do what you think is best !