I've killed 2 bull moose with amax's. one 155 and one with the 208. Neither kill was pretty and both were never planned. I would have never intentionally chosen the Amax as a moose bullet but due to last minute circumstances, they got used. In both cases, bones (other than ribs) were involved. In both cases, neck bones were involved. One was at 440 yards and the other at 25 yards. They evaporate on bigger bones and even evaporate in rib cages of big bulls.
I've killed quite a number of deer and sheep sized critters with them and would never hesitate to use them or hesitate to recommend them on such game, but bigger game such as mature bull elk or moose, I would never recommend them nor plan to use them. You're begging for trouble.