First off, this is really a chance to buy another gun, right? Eeeeeehaha!
In that case, get something you dont have! And make it something BIG.
.41 Mag is neat and I like the Tauruses. But lets not fool ourselves - not big ENOUGH. Don't they make a Taurus in .44 Mag? They do right? Well, there you go, problem solved. Go for the .44 or .45. It's what you really want, anyway; the rest is just rationalization. Go BIG wheelgun, man!
Second, the idea of a handgun on a hunting junket, when you are standing there with a capable rifle, borders on oxymoronic. Oh sure, some dopey doe might saunter by and give you a chance to pop her with your six-gun. Or that all important coup de grace might be needed, because your intial shot wasnt just so. But, man, you are right there with a rifle! Why bother with a second gun. It aint like the deer is firing back at you from behind the rocks.
Now, let me admit that I am NO heap big hunter. I'm spolied, as I live in the south and the Marlin .35 Remington I favor or the .30-30 next to it are about all I want along. And about all I need. My .308 gets to come out once in a while, but it can be overkill at times (In fact, I'm thinking about trading it down to 7mm-08). Fact is, I have no other hunting rifles, aside from a 12ga. Mossie with an extra Slugster barrel (is that rifle, or shotgun? - oh well, no matter).
Sometimes, I even do the blasphemous and only stuff two up, toting some extra rounds in my pocket wallet if need for them arises, which it doesn't. I stand before you in abject apology, as I really do miss the point of the wheelie as "backup" hunting gun.
However, going "hunting" as a reason to just shoot the thing as I see fit, now that I can relate to. If it were me, I'd boot Alain Quartermain out of my imagination and just come out and admit it: I want a really big, new-to-me six-shooter.
That sounds like good enough reason to get one!