If you do you homework, there are few really new cartridges. All developed decades ago under another name.
Interesting, how many cartridge case lengths are in inches - USA, British, German, Russian, etc
19= ¾" 9mm
25= 1" Tok
39= 1½" AK
45= 1¾" 223
51= 2" 308
57= 2¼" Mauser
63= 2½" 30-06
etc