My rifle is...a carbine.
An 1873 made by Uberti in 44-40
Why? you ask. Well, because I like it, and they made a Western called Winchester 73, and it's the most period correct covering a large span of the Old West years. there's the 66 of course, but it can't be had in the original caliber. And I just plain like the 73.
Also, the 73 action is quite fast to operate and is not prone to jamming.
On the other hand, I recently aquired (it's not in my hands yet, darn beurocratic Country) a Rossi 92 rifle with 24 inch octagon barrel in .44 Mag. It's a John Genius Browning design afterall.
Also, the action is really strong, much stronger than the 73 and dare I say it, stronger than the 94. That's why I chose it in the non period correct .44Mag, to use the action true potencial, since it's also intended as a hunting rifle.