Although made from modern steel, and with a spring-loaded, frame-mounted firing pin, given that they were a limited run, and parts MIGHT be hard to come by, I'd recommend against protracted dry firing without snap caps installed. Not sure if you can get the spring-loaded "primer" snappers in .45 Schofield or not. If not, I'd use fired cases with the primers installed. REPLACE THE PRIMERS WITH OTHERS THAT HAVE BEEN FIRED, or possibly some leather disks punched out, if you can find the right size punch.
Hope this helps...