Yep - 270 will work great. A 150gr bullet and down it goes. Moose aren't that tough to kill. A 260 or 6.5x55 is plenty. Heck, a lot of moose are killed during the winter hunts off snow machines with .243s. However, for out of state folks hunting in the fall...... often there are bears that are not so wimpy where you find those moose - so going bigger has as much to do with them as to do with the moose - and if you wind up having a brownie that you can't see, huffing and popping his teeth at you from 20 feet away, through brush that is over your head then a 375 H&H is gonna seem small.