I, personally was by all accounts, "under gunned" while up in Griz country. I carried a 41 magnum in a chest holster. I reckon since I really never had to use it on a big brown that I was very lucky. I did use a 45-70 single shot a few times, a 338 win mag a few times. I have seen people using 10MM glock 20's in recent years. mostly it's been a second guy using a carbine/trapper length 45-70 lever or a 450 Marlin, or a barely legal 12 gauge pump with slugs and bird shot. I have to admit the 460 and 500 Smith and Wesson magnum X-framed revolvers are appealing to me. the one consern I have is the shot you have to take. whether it is a full frontal shot (face and head) , partial side shot (shoulder, 1/4ing to chest), or full side shot (neck preferably, shoulder/rear quarters, or chest shot) whether or not the shooter is skilled enough. I know I would take a great many hours practicing with what ever shot I would have to take. eye sockets are pretty hard to hit, shoulder shot have to be equally precise, chest shots not so much, and then neck shots; the best shot I know to stop an enraged bear. I will catch hell for my assertions but of all the shots I have seen on big angry inland brown bears or any big brown bear; the neck/spine shot has been the most effective in stoping a bear immediately. that one shot to disrupt the central nervous system has been the only shot that has reliably stopped any bear I or any of my friends have taken to put down any angry brown. no other shot I have taken has ever come close. I have even had to assist on a bear take down where he was hit 17 times before I was on scene without any loss of mobility. I waited for the neck/spine shot for a good 5 seconds (felt like hours) so I could stop him without any more problems. that was a sad day for me and my friends. I would like to forget that day but it is seared into my memory as the day nothing went right or as planned. for those pilots out there.. just think.. flight plan as filed on your worst day flying.