I need to pick your brains to possibly get an answer to this burning question. Here goes. The 1873 Winchester was chambered in various center fire cartridges, all using black powder when introduced. Hence, we have the 44-40, 38-40, 32-20, 25-20 etc. etc. Not sure about the others, but the 44-40 dates back to the Winch '73 in 1873. It was a great year! Colt brought out the SAA, also in 1873. It was chambered in most if not all cartridges as the Winch 73 plus the great .45 Colt. My question is: All of the other cartridges have a second two digit number designating the black powder charge. Why was this common practice not used for the .45 Colt or shorter Schofield round? Both originally black powder cartridges. I have seen old Winchester's stamped .44WCF and an old 94 30-30 stamped 30WCF but never saw an ammo box that did not use the complete caliber designation like in .44-40 Just curious if there is a specific reason the black powder designation was not used for the .45 in 1873