Vance, You may take a black and moose with the lighter bullets but don`t risk it on a brown......You list black bear, moose and brown bear. If your going to use a 44 mag and brown bear is on your list then go with the 300.. You live there and I know you`ve seen how big these animals can get... One thing I found out while hunting Alaska is "that you never know what you can run into". My brown was NOT big and I was lucky to take him but I wish you could have seen the size of the big brown bear that I could not get a shot at....My God but these creatures are big and if Swift made a heavier A-frame for your 44 I would recommend it... Remember, the bear in the photos was "small".. If you don`t have enough bullet for them the only winner will be the brown bear.. Good luck and good hunting.