.357 SIG Ammo

The .357 SIG ammunition category brings together a selection of high-velocity rounds designed for semi-automatic pistols. Esteemed for bridging the gap between revolver power and the capacity of semi-automatic platforms, the .357 SIG offers exceptional stopping power, accuracy, and reliability. Our catalog features top-tier ammunition from the industry’s leading brands, catering to law enforcement, self-defense, and competitive shooting needs.

Intended Use: The .357 SIG is engineered for high-stakes applications, making it a top choice for law enforcement agencies and civilians alike for self-defense. Its ballistic performance closely mimics that of the .357 Magnum revolver round, providing superior penetration and stopping power, but in a format that is compatible with the higher capacity of semi-automatic pistols.

Caliber/Size: Developed in the early 1990s by SIG Sauer and Federal Cartridge, the .357 SIG is designed to replicate the .357 Magnum’s ballistics in a smaller, semi-automatic cartridge. It is based on a .40 S&W case necked down to accept a 9mm diameter bullet, offering a unique combination of velocity, accuracy, and stopping power.

Performance Characteristics: The .357 SIG is known for its flat trajectory, high velocity, and exceptional stopping power. It is capable of defeating automotive glass and other barriers without significant deflection, making it highly reliable in tactical and self-defense situations. The round’s performance is enhanced by a variety of bullet types, including jacketed hollow points (JHP) for self-defense, ensuring effectiveness against threats.

Material and Construction: Ammunition in the .357 SIG category is produced with high-quality materials, featuring robust brass casings and precisely engineered projectiles. The selection includes various bullet designs to meet different operational requirements, from training and target shooting to tactical and defense scenarios.

Brands and Manufacturers: This category includes products from industry leaders like SIG Sauer—the caliber’s co-developer—alongside other reputable manufacturers such as Sig Sauer, Federal, and Precision One. These brands are synonymous with quality and reliability, offering shooters the best in .357 SIG ammunition.

A Brief History: The .357 SIG cartridge was introduced in 1994 as a collaborative effort between SIG Sauer and Federal Cartridge. It was developed to offer the power of the .357 Magnum in a high-capacity, semi-automatic pistol format. The cartridge quickly gained popularity among law enforcement agencies for its outstanding performance in terms of penetration, accuracy, and stopping power.


  1. Is .357 SIG a good choice for self-defense? Absolutely, the .357 SIG is an excellent choice for self-defense, offering superior stopping power and penetration, ensuring that it can effectively neutralize threats.
  2. Can I use .357 SIG for target shooting and training? Yes, while .357 SIG ammunition is on the higher end in terms of cost, it is suitable for target shooting and training, especially with FMJ rounds designed for practice. It provides an opportunity to train with the same power and recoil profile as defensive rounds.
  3. How does .357 SIG compare to other semi-automatic pistol calibers? The .357 SIG stands out for its high velocity and stopping power, comparable to the .357 Magnum, but with the advantages of semi-automatic pistol capacities. It exceeds the performance of the 9mm and .40 S&W in terms of velocity and penetration, making it a unique option for those requiring maximum performance.

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