I hunt with a Tikka T3 Lite. So I would opt for the lighter of the two. Either cartridge is more than what you need to knock over a moose. Of course the .300 WSM will give you range if you can't close the gap.
Either will shoot plenty flat for moose as long as the OP figures out how flat it does shoot.
Mark Begich, Joaquin Jackson, and Heller resistance... Three huge reasons to worry about the NRA.
