Unfortunately I don't have any experience with brown bear to bring to the table (Only minimal black bear). But I can add a story that happened recently to Jack Hanna who had to fend off a bear attack in Montana. The following link nicely shows the benefits and drawbacks of using bear spray.
http://www.10tv.com/live/content/lo...r-montana-jack-hanna-bear-attack.html?sid=102
If it were me personally, I'd ideally want to have both spray and firepower with at least two people. I'd also decide beforehand that in the event of a bear charge, one of us would be using the bear spray while the other unloaded with whatever firearm we had with us. But thats just my uninformed opinion.
Just like all these threads, I've heard of bears taken with .45acp, and bears who took 6 rounds of .44 magnum and kept on coming. It would seem that many bear attacks are often stopped by the sound of a gun firing, but that in the event the bear keeps coming, the larger the gun, the better your chances. Since Bear attacks are relatively rare, there is very little data to go on. Most folks seem to chose a round based on how comforting it makes them feel rather than based on any actual data. It would also seem that when it comes to Bear and firearm defense, you have a lot of odds stacked against you since Bear can attack very quickly and very quietly. Just search for bear attack videos on the internet to get a taste of just how quickly it can happen.
http://www.10tv.com/live/content/lo...r-montana-jack-hanna-bear-attack.html?sid=102
If it were me personally, I'd ideally want to have both spray and firepower with at least two people. I'd also decide beforehand that in the event of a bear charge, one of us would be using the bear spray while the other unloaded with whatever firearm we had with us. But thats just my uninformed opinion.
Just like all these threads, I've heard of bears taken with .45acp, and bears who took 6 rounds of .44 magnum and kept on coming. It would seem that many bear attacks are often stopped by the sound of a gun firing, but that in the event the bear keeps coming, the larger the gun, the better your chances. Since Bear attacks are relatively rare, there is very little data to go on. Most folks seem to chose a round based on how comforting it makes them feel rather than based on any actual data. It would also seem that when it comes to Bear and firearm defense, you have a lot of odds stacked against you since Bear can attack very quickly and very quietly. Just search for bear attack videos on the internet to get a taste of just how quickly it can happen.