And then you say "9mm Luger" in your post. Perhaps I got your post wrong and I missed that you were just trying to one up me with sillyness. My apologies.
And you use an off-shore reference for the proper designation of a U.S. cartridge?
The Sporting Arms and Ammunition Manufacturing Institute (SAAMI) and the American National Standards Institute (ANSI) establish the full and abbreviated names of standardized cartridges. The "ACP" designations were obsoleted prior to World War II. Where have you been? And don't blame the gun writers. It has long been known that their only education in the guns and ammo field is by reading other gun writers. The blind leading the blind.
It is no more appropriate to use obsolete cartridge designations than it is to address a married lady by her maiden name. Please brush up on your knowledge before posting about a subject which you obviously have very little factual information.