Thank you Russ for stepping in after my post.
As to overruns of the Missouri variation, I apparently underestimated and I will gladly go with Russ' estimate.
As to the name for the Missouri variation, all of the surviving boxes used CM labels, and the 4 inch was changed to a "5."
Just to add some further confusion to the naming issues, here is the ad H. H. Harris used to run for the 5 inch straight wall barrel K38 Masterpiece. Notice he refers to this straight-walled 5 inch K38 as a "S&W .38 - 5" Combat with Target Hammer."
