Just wondering about brass/ bullet availability.
It sounds like 45/70 the brass might be doable.
It also sounds like a person can load it down successfully with trailboss.
Any suggestions?
45-70 is how we made the 475L cases in the 80s. Unless your revolver was built for the large rim diameter the 45'70 then cases made from 45-70 brass will have a rimm diameter that is too large for your revolver.
The rim could be cut down