We all know that the cartridge known as .38-40 is really a .40-40. Just for the sake of pondering, what kind of performance would a "true" .38-40 have? You know, a .44-40 case necked down to take .357" bullets backed by 40 grains of black powder or a more or less equivalent smokeless load.
FoCuS: - Jeffersonian
I am getting into the old cowboy six shooters
40S&W to 9mm conversion in a 226
My favorite 357 - SASS Wire Saloon - SASS Wire Forum
40S&W to 9mm conversion in a 226
GD - January 2016, PDF, Caliber
40S&W to 9mm conversion in a 226
Are .380 pocket pistols prone to reliability problems? - Quora
Are .380 pocket pistols prone to reliability problems? - Quora