Lucky for him, if that Bear had been on Meth then it would have kept right on coming. Also, if he had used buckshot or slugs than it would have killed the bear twice as dead!
But seriously, this is why Bear Defense threads are so stupid. Bears aren't the four-legged Abrams Tanks that folks on forums seem to think that they are, and you don't actually need to have the biggest, baddest, most shoulder-bruising, wrist-fracturing firearm available to drop a bear, but folks will continue to argue about how nothing short of a .700 Nitro Express is adequate for the illusive, one-ton Kodak Camera Polar Bears who roam the frozen wastelands of Alaska, high on cocaine from all that Coca-Cola they're always guzzling.