It's not really the "clinging to life" but more along the lines of actual weight to carry with no oxygen being pumped through the muscles. But you 2 are indeed correct that Moose lay down much faster and easier than Elk. Unless you have a seriously rutted up Bull Moose on the warpath. Nothing short of spinal interruption puts one of them down quick. It can really be a "bad day" if you nail one with a bow and the damn things spots where you are! Sometimes people forget that a Bull Moose, while being big, dumb, and ugly as sin, is still a wild animal and can be just as deadly as a Brown Bear if provoked. I tend to go for a High shoulder shot with all big game with firearms but if Bow Hunting then I like to have a nice tree that's quickly accessible when hunting those that are bigger than me and I aint no small feller I've taken Elk with the 7mm.08 but in my honest opinion it really just doesn't have the availability of weight for bullets to get to the spine with my chosen shot placements. It's perfectly fine for tucking in behind the shoulder and for quartering away shots but to get through the hide, muscle, and heavy shoulder bone (yes the high shoulder of a moose is still pretty heavy) I just prefer having a bit more "meat" on my bullets than I can load up accurately for my 7mm08 barrels.