Phew, I wouldn't want EITHER the 13# OR the 10#er for a mountain rifle! I'm 6'4" 250 & can carry anything but it doesn't mean I would like it.
I just put together a SWEET rifle for my best bud (his wife wanted to give him something nice for their 20th anniv) I ordered him a Sako Finnlight in 7mm-08. The entire rig is under 7# (has a 3x9x36 Z3 Swarovski but any decent, smaller scope will fit great) it fires a cloverleaf group at 100yds & carries like a dream. Any 140 Barnes, Nosler E-tip, Federal Trophy Coper etc... will MORE than plow thru a wapiti at normal ranges. If you didn't want to go that deep into the pocketbook then checkout the Ruger American All Weather Compact. Great lil rifle for under $500.