I know a couple of young Alaskans who've taken plenty of big game, including moose and grizzly, with their .223's. They're kind of puzzled when people say it isn't enough.
^this I remember watching one of the Alaska shows on discovery. They had a bear coming in at night eating their salmon. They caught the bear in the act, couple shots from an AR (only assume it was 223 or 556) and it was over with!
All of them do something better than the 30-06, but none of them do everything as well.
