357 Sig: Old Ammunition Has Value

Compact .357 SIG with ammunition

SIG SAUER and Federal Premium Ammunitions introduced  .357 SIG ammunition in 1994. The cartridge has a rimless, bottlenecked case. The companies wanted to have the same power as the .357 Magnum, but designed it for use in a semi-automatic pistol. The ammo was launched four years after the .40 S&W, a round created for the FBI.  The .40 S&W has the stopping power of a .45 ACP and ease of use of the 9mm parabellum. Although the .357 SIG performed better than the .40 S&W, it never became as popular with law enforcement or the public.

.357 SIG Design

The designers took a .357 bullet and pared it down to .355-inch to make it easier to handle. The .357 SIG was the first commercial bottleneck ammunition sold since the 1960s. The cartridge base diameter is .424-inch, the case is .864-inch in length. The full length of the cartridge is 1.140-inches.  It uses a bullet with 125-grains, the same as a .357 Mag. It has a velocity of 1,350 feet per second (fps), and muzzle energy of more than 500 foot pounds (ft·lbs). The round is also referred to as the .357 SIG, .357 Sig, and 9x22mm.

.357 SIG vs. .357 Magnum

Although the .357 SIG never became popular, it remains a favorite of some law enforcement agencies, as well as target shooters and those who are in range training or carry for self-defense. Unlike other small rounds, the .357 SIG has the ability to cause hydrostatic shock, immediately disabling or fatally wounding its target upon impact. While the .357 Magnum remains more popular, the .357 SIG still packs a punch. The smaller casing makes it optimal for self-defense.

Popular Firearms

Because of its lack of popularity, the .357 SIG has a limited number of firearms chambered for the ammunition. They include the full size SIG SAUER P226 (combat pistol), the compact 229, the 320 (designed for concealed carry), as well as a traditional 1911. Glock models include the full-size G31, compact G32, and G33, designed for concealed carry. S&W has discontinued their .357 SIG pistol from their M&P line.

Uses for the .357 SIG

Law enforcement agencies prefer the 9mm, but many still use the .357 SIG as a standard issue ammunition for the SIG SAUER and Glock pistols. The Texas Highway Patrol took it on in 1995, followed shortly by The Texas Department of Public Safety (DPS). The DPS used the .357 SIG as standard issue from 1998-2013. Other notable agencies include the Bureau of Industry and Security, Federal Air Marshal Service, The United States Secret Service, Pennsylvania Game Commission, and the Texas Rangers. It is also used by several state police troops and highway patrol units, including Mississippi, Montana, New Mexico, North Carolina, Oklahoma, Rhode Island, South Dakota, Tennessee, and Virginia.

Many experts refer to the .357 SIG as being obsolete but the fact that it is still used by so many law enforcement agencies shows that it has its place in the market.

 

 

 

Who Uses a .357 SIG?

.357 Sig ammo

In the mid-1990s, Swiss-German arms manufacturer SIG Sauer teamed up with Federal Cartridge (now Federal Premium Ammunitions) to develop a new cartridge to rival the .357 Magnum. The team designed the .357 SIG after the .357 Mag to duplicate the performance of the .357 Mag while offering shooters a higher cartridge capacity to be used in semi-automatic pistols. The target audience was law enforcement, which never fully embraced the new round.

Development of the .357 SIG

The .357 SIG ammo was introduced in 1994, only four years after the S&W released their .40 cal. The .40 S&W had been commissioned by the FBI after the 1986 Miami shootout in which two agents were killed and five were wounded. The FBI had requested a new load that would have the power of a .45 with lower recoil and faster reloading time. Although the .40 S&W wasn’t a perfect replacement, it was readily adopted by law enforcement agencies throughout the U.S.

At that time, neither law enforcement agencies nor the public was ready to embrace another round for a semi-automatic weapon. Therefore, the .357 SIG never caught on despite its superior performance record.

Ballistics

SIG designed the original of .357 SIG ammo was .357”, but then reduced the overall size to .355”, making it easier to reload. SIG created the first bottleneck commercial handgun cartridge manufactured since the early 1960s. Like the .357 Mag, it uses a bullet with 125 grains. It boasts an average velocity of 1,450 FPS and muzzle energy that exceeds 500 ft. lbs. The shoulder is alpha/2=18 degrees. The common rifling twist rate is 406 mm (1 in 16 in), 6 grooves, Ø lands=8.71 mm, Ø grooves=9.02 mm, land width=2.69 mm. The primer type is small pistol.

Who Uses a .357 SIG?

The performance and smaller dimensions of the .357 SIG should make it a more popular cartridge among law enforcement, but it has never caught on. Many officers have chosen to adapt to a 9 mm Parabellum for their standard sidearm. It is a preferred round for many target shooters and those interested in home defense and self-defense. Unlike some smaller rounds, the .357 SIG is capable of causing hydrostatic shock, disabling, or even fatally wounding its targets upon impact.

Many large law enforcement agencies supply their officers with .357 SIG ammunition. Officers use the ammo in SIG Sauer models and Glock pistols. The Texas Highway Patrol adopted the round in 1995. The Texas Department of Public Safety (DPS) followed suit. They had previously given their troopers a choice between the SIG Sauer P220 in .45 ACP or the SIG Sauer P226 in 9mm. From 1998-2013, The DPS issued the SIG Sauer P226 chambered in .357 SIG as a standard sidearm for its commissioned officers.