The first modern smokeless powder cartridge deliberately loaded by a major manufacturer to higher than standard pressure was the .38 ACP, originally introduced in 1900. This cartridge provided performance similar to other .38 caliber cartridges of the time. However, in 1929 the cartridge was redesigned as the .38 Super Automatic, or just .38 Super, along with a significant increase in operating pressure and muzzle energy, making it the most powerful auto pistol cartridge available, in both energy and velocity, for many years. Like the "rifle only" loads, the .38 Super could still be chambered in the older .38 ACP guns, producing a dangerous combination. Capable of reaching a muzzle energy of 500 ft-lbs, the .38 Super remains a viable defensive cartridge, though it is most popular in shooting sports such as IPSC. A similar move to a high pressure loading was done on the .38 Special in 1930, producing the .38-44 HV loadings, and eventually leading to the development of the .357 Magnum.