When I lived in Alaska, out in King Salmon for three years most of the locals used old rifles in standard calibers for moose. Residents could hunt them in December on snow machines pulling sleds, makes it much easier then hunting the bogs in September. Anyways, lots of moose fell to 270, 30-06 even .243 rifles. Some used big mags if they hunted September, more for the bears than the moose. Personally after hunting elk all my life I believe an elk can take much more punishment than a moose. Moose rarely drop in their tracks but they are done for if you made a good shot.