sentences:  It was chambered for the .38 ACP, which is stamped on the slide as "Calibre 38 rimless smokeless".The .38 ACP was a slightly less powerful cartridge than the 9×19mm Parabellum and it is now considered obsolete as there are no new firearms being chambered in .38 ACP.While using a locked breech, the pistol's locking design was not very strong, and was superseded in 1929 by an M1911A1-pattern pistol chambered in .38 Super.