Given what you list - I'd prob end up with a 7-08 in TSX of some sort for both the moose and caribou.
This is the road I'd take. I killed a pile of caribou years ago with 140 Xs; never recovered a one. Poked a hole through a moose with one - in the slats; that one was lost as well….the bullet that is. Everything I hit with those bullets is long since eaten and gone. I have had a lot less difficulty stopping 6.5 bullets for some reason, whether in caribou or moose.
