Bear166, replacement parts are over-sized and are to be fitted which is why the relief cuts aren't there. For whatever reason, folks don't realize that screw holes don't have perfect alignment, screws/screwpins are usually warped, and that's why action parts need to be fitted to that particular revolver. Depending on the "depth" or how extensive the tuning is, just switching the trigger and bolt screwpins may be all that's needed to keep the revolver from functioning.
So, your new hand is too long which is why you can't get the hammer to full cock and /or the action locked up. Using a flat surface with 320 sandpaper, sand the top of the hand keeping the angles as close as you can. It will be the correct length when the bolt locks the cylinder as the hammer reaches full cock . . . not before and not after (drag a finger on the cylinder when determining this)!! When you achieve that you'll be one step away from perfect timing! Woohoo!!
Mike
