OK, I measured my Schofield. Remember, mine is a .45, so there may be some differences.
From the barrel face, the length of the base pin is 1.312 +/-. From the area where the cylinder rides, it measures 1.357 +/-. There is a slight bushing on the front of the cylinder, which is what rides against the area around the base pin.
The barrel cylinder gap is VERY tight on mine, at least when the frame is closed and the hammer down. I thought that I might not have a feeler gauge thin enough to fit in there, but I finally got my .0025 gauge in between the cylinder and the barrel. There is no discernable end-shake when the frame is closed.
I don't know what the tolerances are for these revolvers, but those are some different measurements...
CC Griff