Oh man! Now I am gonna have to get a Walker!

...Howell to Kirst which almost seems simpler?

https://kirstkonverter.com/colt-walker-dragoons.html

with a long gun to reach out there one would have been very well armed back in 1850. They would make a very formidable war club I'd imagine too.

I personally prefer the slightly smaller Dragoon series that does not suffer from drop-itis of the load lever. They stll hold 50 grs. of powder to the Walker's 60 or so. The normal sidearms that came later nominally hold about 30 grs. of powder under a seated ball.