Assume pure-lead 0.389" diameter round ball, and Colt cylinder chamber diameter of 0.377".  Is ball too large to seat in a Colt clone using the attached loading leaver while holding revolver? (Not removing the cylinder for a load press.)   My NIB Uberti 1861 Navy, manufactured 1969, has cylinder chambers at .377".  Hornady swaged round ball, .375" diameter, drops straight to bottom of chamber.  Chamber mouths are slightly "chamferred".  Looks like the factory used a course grinding bal