Gun Wiki
Question book-new.svg.png

This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.

The .357 SIG is a pistol cartridge, designed by the Swiss firearms company SIG Sauer.

Design details[]

It is based on a .40 S&W case necked down to accept 0.355-inch (9.0mm) bullets; the .357 SIG brass is slightly longer (0.009-inch (0.23mm) to 0.020-inch (0.51mm)). The cartridge is used by a number of law enforcement agencies and has a good reputation for both accuracy and stopping power.

Developed in 1994, the new cartridge was named ".357" to highlight its purpose: to duplicate the performance of 125-grain (8.1 g) .357 Magnum loads as fired from 4-inch (100mm) barreled revolvers in a pistol cartridge. Its performance is similar to that of the 9×23mm Winchester.

The .357 SIG provided a self-defense cartridge close in performance to a 125 gr .357 Magnum, but from a semi-automatic pistol with greater ammunition capacity.

Other than specialized competition cartridges like the 9×25mm Dillon (1988), necking a 10mm Auto case down to a 9mm bullet, the .357 SIG was the first modern bottleneck commercial handgun cartridge since the early 1960s, when Remington introduced the unsuccessful .22 Remington Jet (1961), which necked a .357 Magnum case down to a .22 caliber bullet, and the .221 Remington Fireball (1963). Soon after the .357 SIG, other bottleneck commercial handgun cartridges appeared: the .400 Cor-Bon (1997), necking the .45 ACP down to .40 caliber; the .440 Cor-Bon (1998), necking down the .50 AE to .44 caliber; the .32 NAA (2002), necking the .380 ACP down to .32 caliber; and the .25 NAA (2004), necking the .32 ACP down to .25 caliber.