I hope you have a heavy revolver - Grizzly Cartridge 44 Magnum 300 Grain Wide Flat Nose Gas Checked Pistol Ammunition

Shot 3 of these out of a Taurus Tracker w/ a 4 inch barrel. Hurts like all get-out, had a bruise at the base of my thumb for the rest of the day. One of the rounds made a perfectly cylindrical hole through 8" of cedar 2x4. I can only imagine what it'd do to a bear or moose, probably go right through the poor thing. The casings are also nickel plated so that's nice if, like me, you plan to keep them loaded in your firearm for an extended period of time in case something happens on the trail. Good stuff.