I posted this on the gunsmithing frorum about a month or so back. The idea I had was for Remingtons, but I don't know enough about the Schofields to speculate whether it would work or not. A half-competant machinest could easily do it - even me; you just have to have a lathe to make it practical.
I wrote:
This is purely hypothetical. I have enough machinest experience to be dangerous, but what I'm proposing would be pretty easy for a machinest. I know that it would NOT be authentic, but could help shooters of Remingtons who want to shoot BP, but who haven't learned the knowledge that comes from experience regarding the use of lube and how much it takes to keep a Remington shooting. (Or even a Colt.)
Making a Colt style bushing would be a simple task as is boring the cylinder out enough for the bushing. The harder part would be relieving the frame enough for the bushing. It could be done with a file, but a machinest would be able to do it with a powered tool. (Mill)
The point is this: would this (non-authentic) mod coupled with other mods (ie: grooving the cylinder pin to hold more lube) enable shooters to shoot their '58, '63, '75, & '90s longer with less problems when shooting their guns with BP?
Like I said, this is hypothetical. I think it would work and probably wouldn't cost that much if you had to pay a machinest to do it, and it certainly wouldn't cost much for those of you with the tools and experience to do it yourself.
Just an idea ...