My only current BP revolver is a Stainless Ruger Old Army from about the time they started making it in stainless. It's as accurate as many of my cartridge-firing revolvers have been but expensive and heavy for the "punch." I won't debate "stopping power," "energy levels" or any of that but will just say that, if I had to carry that much steel on a regular basis, it would be a big bore cartridge gun. There is little that can surpass the thrill of lobbing lead spheres through a cloud of stinky, choking smoke though.
What I am getting at is that I percieve the .36 caliber to be the berries for such interests. A cap-n-ball .44 (.45 in the case of the Ruger) is NOT something I would put much faith in for "bear protection," so, ruling out the whole idea of using it for such things, I would personally focus on something that would give me less weight, more shots per pound of lead/powder and something that would put a smaller hole in small game. As for defense against bipedal aggressors, at least one successful early gun-fighter employed the lowly .36 to very good effect - something to read up on.
Paying close attention to bore and groove diameter, but more importantly chamber diameter, one can also mate certain bagged shot sizes to some of the smaller caliber revolvers. Dixie Gun Works used to sell a couple copies of lesser known revolvers which were designed and made quite well in lighter-weight class of revolver. I don't mean the .32 "vest" revolvers either. I am talking about something that is still "big" for what it fires by cartridge gun standards today.
Don't forget to check state and local laws! While the federal government does not lump these in with cartridge guns, many states and municipalities do. Also don't forget, there are some extra things to consider regarding safety with this type of arm and Lyman covers most of what you need to know in one of their manuals. Also look for anything written by Sam Fadala.
It's addictive but the educational quest it leads you on is very gratifying and can keep you busy for several years. If you're going to use the Internet to research this subject, don't forget to use it to look up the many, many old texts written on the subject. Most can probably be had pretty cheap through one of the many used-book resources on the Internet. I have found that my County Library even has some good books on the subject.
One thing to keep in mind when experimenting - look for percussion caps that won't split and turn into shrapnel when fired. While this is considered by many a "plus" on a rifle, it has caused me much grief in binding the cylinder. I would prefer to have to wiggle spent caps off the nipples with a pair of needle-nose pliers after firing a cylinder-full than taking the gun apart between shots. Dixie Gunworks used to sell a "house-brand" Italian cap that was perfect but the discontinued them many years ago. Had I seen that one coming, I would have put back about ten thousand for myself.