That would be a centerfire, using a Heel type bullet. For an original, it would be a black powder only, hand loading proposition. but even then, I'm not sure I'd shoot it. CAS can be pretty hard on weapons, thus most of us gravitate toward reproductions. If you brought that to a match, or any of the others, you'd get a lot of oohs and aahhs.
The SAA and Win 73 are good to go for what we do, plenty of spare parts, though both in my opinion would be BP only as well. But an Original Richards might be too rare and too fragile for competition. But you have my envy for certain!