I have a BUNCH of .38 Short Colt brass….

by Bob Hatfield , Thursday, June 04, 2026, 08:15 (5 hours, 39 minutes ago) @ Otony

Yes, I installed the Kirst cylinder in a Pietta Navy about 5 years ago. The "Everything Black Powder" guy on YouTube uses 357 brass and hollow based wadcutters in his Navy conversion with the .375-inch barrel but he must use a different brand of cylinder. My Kirst cylinder has a step in the chamber that will allow a 38 special case to fit, but not a .357 case.

I thought that my cylinder was for a conversion that was to be used with a sleeved barrel as I thought the cylinders used with the larger barrel were bored through. But my chamber mouths are still .371 or so. The step is not a normal step. It is just slight enough to prevent a .357 case from entering.

The things we tinker with to the wonder of a normal human being LOL.