Having swapped over at least a dozen or more cylinders here is what I have found. First the length of yoke tubes or depth of center hole in cylinder varies. Could end up with the cylinder actually riding on the gas ring instead of the end of yoke. You may have to shim or trim length of tube to match. If you trim the tube you will need to add shims to original cylinder to reuse it on trimmed tube. There may or may not be some variation in B/c gap but usually only 0.001-0.002. So far for me 90% of the time the actual timing is OK as is chamber to bore alignment. Sometimes you get lucky and some times you don't. I only have one 2 cylinder guns left, a 224 Harvey Kay Chuck with a matching 22TCM cylinder. I went to the have several gun method. I do have a couple of 45 colts cut for moon clips to shoot acps, but then there is no second.
cylinder. If I wanted a 9mm revolver I would just get a model 14 or 15, and rework the cylinder.