Contrary to popular belief, most moose are taken at close range. The need for a flinch developing magnum cartridge becomes less relevant under these conditions, especially when that same firearm may be used for deer hunting. Calibers such as the 308 and 30-06 are tough to beat because of the variety and availability of ammo for them. I personally handload and use the 7mm mag but would use an ' 06 in a heartbeat.