I hunt with a 7x57 model 1908. I use it for bear, moose, and deer.
I find that pretty much with any mauser in good shape, you can't go wrong - they're incredibly accurate. (Perhaps something to do with the 14 foot barrel). 7x57 is plenty big enough for moose - assuming you can hit the vitals (and you shouldn't be shooting if you can't).
It's a little heavy to be slogging through swamps though.
Just watch out for the price of the ammo.. best I can find is $25 for a box of Core Lokt.