Springfield Armory XD 357SIG

XD Pistols 357SIG

XD Pistols offered in the blazing fast 357sig. SIGARMS, in partnership with Federal Cartridge, developed the .357 SIG cartridge in 1994. Contrary to popular belief the .357 SIG cartridge is not a .40 S&W case necked down to accept .355" bullets. Forming brass for the .357 SIG in this way is dangerous, leading to case ruptures due to generated pressures much higher than those the .40 S&W case was designed for. Instead the .357 SIG round uses thicker brass than the .40 S&W casing to cope with the higher pressures caused by the neck of the casing. Allegedly, SIG shied away from calling its new cartridge a nine-millimeter-anything for fear of public rejection of the round. Instead, it was dubbed a "357" in order to highlight its purpose: to duplicate the performance of 125-grain .357 Magnum loads fired from 4-inch barrelled revolvers, except in a cartridge designed to be used expressly in an autoloader platform.