The brass frame had a tendency to stretch destroying the lock up if a high power cartridge was used. Reproductions should only be fired with the low powered pistol rounds.
I bought a used one forty five years ago in .38 Spl and I believe it was fired with hot handloads as it often did not fire and would not eject the case. Just a few thousands of an inch of stretch can ruin the lockup. I should have known something was wrong as the price was so low.
A NEW one in .44/40 worked fine.
This is why the 1873 steel frame one can be used with .357 Mag loads, and one 1873 I had years ago worked well with hot 44/40 handloads.
Never trusted brass frames...
Used a Marlin, and Ruger Vaquero Bisleys.