150 Ballistic Tip worked well on a fully mature bull elk for me this past year. I think bull elk are a bit tougher than bull moose.
Elk may be less inclined to lie down where you want them to, but they surely aren't as resistive to bullets as moose can be. Accuracy need not be a primary factor in choosing a load for animals the size of moose.
I've been in on the killing of AK moose. Didn't strike me as especially hard to kill. Certainly no different than elk, and perhaps a bit "softer."
My shots on elk can come out past 500 yards, so accuracy always interests me.
