By 1923 a special Thompson smg was developed with a longer barrel chambering a special experimental cartridge based on the 45 ACP cartridge case. The new 1923 cartridge used a case one inch long with a 250 gr jacketed bullet at 1450 fps. Both REM-UMC and Winchester loaded this cartridge. Without any interest from law enforcement and military, this soon died,
these 1923 cartridges still turn-up, headstamped REM-UMC 45 ACP.

my photo shows a 9,8 Colt, 45 Thompson 1923 and 455 auto