While it isn't all that difficult to punch holes through a common, average size grizzly, they are not the same in killing that moose are by any stretch. Where moose and caribou almost never attempt anything resembling a final threat to their antagonist, the same is certainly not the case with bears. And while they often attempt to flee, they are also much inclined to cling to the very last shred of life they can muster, quite unlike NA ungulates.
I would further caution that killing an upper level predator is not the same is killing prey animals or smaller predators. While one may be comfortable with having mastered "buck fever" when it comes to the "lesser" species, one of the bigger bears can incite a good case of beginner's fever all over again. They certainly don't lend themselves to one's best shooting necessarily. And don't think it can't happen when you decide to become the hunter even if they don't bring out the jitters when you've watched them up close.
