I carry a 4 5/8"" Ruger Blackhawk .357 or a 4 5/8" Ruger Single Six .22lr 95% of time. I also carry bear spray when in the mountains north and west of Canyon Creek, MT all the way to Canada. I have experienced Griz up close and personal and agree with what MT Fish and Wildlife recommends. A revolver, no matter how big is not the best way to deal with a bear charge.
Not to rain on anyone's thinking they are a manly-man, but a bear can cover 100 yards in about 5 seconds. In thick timber they can cover the distance from pitcher's mound to home in about 2 seconds....draw and put a big bore bullet into a brain the size of a softball moving 35 mph. Not happening..I don't care how good you are.