While some would say the .270 Win is "marginal" for Moose, it will take them just fine if you do your part. Moose aren't that hard to kill. There are tens of thousands killed every year in Newfoundland, with the .303 British accounting for the vast majority of them. I do prefer a heavy for caliber premium bullet in the .270 though, in case the shot is muffed. The extra weight and performance of a premium bullet adds an added measure of safety & I'd consider extra "insurance" for a successful hunt.