I’m building a database of cartridge calibers, mostly for my own use, but perhaps for general publication later on. One of the first steps is trying to classify - on a broad level - the category that a caliber may fall into.
This is an extension of the chapters in Cartridges of the World, and is therefore somewhat arbitrary. Disagree with Barnes all you like, it is still the first book most collectors ever get, and probably colors the way a lot of people categorize cartridges.
Here’s what I have come up with, and I invite any and all to contribute their thoughts:
Early & Patent Ignition
Pistol & Revolver
American Sporting Rifle
English Sporting Rifle
European Sporting Rifle
Wildcat (Pistol and Rifle)
Military Rifle (Small Arms)
Heavy Military Rifle & MG (to 15mm)
Light Cannon (16 to 40mm)
Large-Bore Military (over 40mm)
What do you think?