It's a relatively low power round throwing a 350gr bullet at about 800 to 1200fpcs. I have a Bowen .50 Special on a Redhawk platform and it is very comfortable to shoot. That .500 platform on an "N" frame with a 5 or 6" barrel would be lovely.
I didn't realize the project would require a re-design and re-tooling to that extent. Would probably not be economically feasible for a such a niche market. Glad I have the Bowen.Be an interesting project. Would need to go to 5 rounds and move the chambers in on the cylinder. That would mean an off center bore on the barrel to move the bore to match the move of chamber in cylinder.
It would all be tight. Rims on 44 mags and 45 colts already dip in between teeth on ratchet and cylinder wall on od side getting thin on 45 colts.
Redhawks start with a .08 wider cylinder . A 500 case is .076 larger than a 45 colt case