Inuit Indians shoot Caribou with 22 win mags so I don' t see the need for a lot f caliber horsepower for them. A 7 mag shooting 140 grain ballistic tips is more than adequate for Caribou as would any of the standard calibers shooting run of the mill bullets. As far as Elk and Moose go 338 Win mag and a 225 grain partition will kill anything I am running into rather easily and the the backup rifle is a 7 mag and it is shooting 160 grain partitions for those two animals 140 grain for the bou.