Never hunted bear with a handgun, and probably never will.
I used to carry a 6" 629, then a 4" 629 (and still own the 4"), but carry a bobbed-hammer Ruger SP101 in 357 as backup for a couple of reasons.
First, a double action revolver seems ideal for a backup. It operates with a single hand, no cocking, no safeties, just pull the trigger.
Secondly, the Ruger is light, small, and fits in my belt or pocket without it hanging up on everything (like the 629s did). I built a little tab that mounts under the Hogue grip that works like the Barami Hip Grip - no holster needed.
The Ruger is stainless, too.
I load it with factory Winchester 158 grain SPs.
Granted, this is nothing to hunt with. It's a sidearm. My hope is never to use it, but if I need to, it will be on my person, unlike bulky hoglegs removed and left hanging in it's holster on a tree branch next to the rifle for the same reason.