Thank you all so much for your considerate replies. I do a bad job of asking questions sometimes.
The revolver I recently acquired is a model 415, which is a .41 caliber 5-shooter. Probably I'm just not used to it yet, but it doesn't feel so comfortable in my hand, and the fact that it has a capacity of only five makes me feel "outgunned", although by whom I'm not sure. This is a strange feeling, since normally I don't carry anything, and I feel fine about that.
The main practical reason I would want something like this is for self defense against dangerous game such as cougar, black bear, and trophy whitetail bucks (honestly warden! he was coming right at me!) that live in the woods around the farm. I don't have a concealed carry permit right now, but do live in an open-carry, shall issue area, and might get one in the future.
I really like versatility in a firearm, and so the idea of a 460 that also fires 454 casull and 45 colt is immensely appealing to me, I'll look into that. The walker is a bit bulky (compared to many rifles), and I've only ever seen it as a percussion revolver. But it is an impressive old gun.
What is .88 magnum? I think that would qualify as a "destructive device" where I live, which would probably make it hard to get ammo for.
Also, I'm not planning on doing any drive by shootings at schools, so what do you mean, drill instructor? I have a feeling there's a movie or pop culture reference here that I don't get.
well, thanks again for your comments everyone.