The .357 SIG is a popular handgun cartridge known for its high velocity and stopping power. Developed by SIG Sauer in 1994, it is a bottlenecked round that is commonly used by law enforcement and self-defense enthusiasts. With a bullet diameter of .355 inches, the .357 SIG offers excellent accuracy and penetration capabilities. It is often compared to the .357 Magnum due to its similar ballistics and recoil characteristics. Overall, the .357 SIG is a versatile cartridge that delivers impressive performance in a compact package, making it a top choice for those seeking reliable firepower.