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The intent of the .357 Sig was to replicate the effectiveness of the .357 Magnum in a cartridge for use in a semi-auto pistol. This design has been especially successful and well respected among law enforcement and federal agencies – including the Secret Service and Air Marshals. Learn More
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  1. Federal 357 Sig Ammo - 50 Rounds of 125 Grain FMJ Ammunition

    Image of Federal 357 Sig Ammo - 50 Rounds of 125 Grain FMJ Ammunition
    $28.99

    4 Reviews

    54 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 1350 FPS
    Muzzle Energy 506 ft lbs
    • 50 Rounds
    • 58¢ per round
    • Made by Federal

  2. Sellier and Bellot 357 Sig Ammo - 50 Rounds of 140 Grain FMJ Ammunition

    Image of Sellier and Bellot 357 Sig Ammo - 50 Rounds of 140 Grain FMJ Ammunition
    $29.99

    1 Review

    42 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 1352 FPS
    Muzzle Energy 568 ft lbs

  3. Winchester 357 Sig Ammo - 50 Rounds of 125 Grain FMJ Ammunition

    Image of Winchester 357 Sig Ammo - 50 Rounds of 125 Grain FMJ Ammunition
    $30.99
    Add Review

    55 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 1350 FPS

  4. Remington 357 Sig Ammo - 50 Rounds of 125 Grain FMJ Ammunition

    Image of Remington 357 Sig Ammo - 50 Rounds of 125 Grain FMJ Ammunition
    $57.99

    2 Reviews

    5 In stock now

    1 2 3 4 5 6 7 8 9 +10
    Bullet type FMJ
    Primer Type Boxer
    Casing Type Brass
    Condition New
    Muzzle Velocity 1350 FPS
    Muzzle Energy 506 ft lbs
    • 50 Rounds
    • $1.16 per round
    • Made by Remington

Overview of 357 Sig Ammo

Introduced in 1994 by SIG SAUER and Federal Premium Ammunitions, the .357 SIG cartridge features a rimless, bottlenecked case designed to mimic the velocity and stopping power of the .357 Magnum while being fired from a semi-automatic pistol. Initially, the bullet size was .357 inch but was quickly reduced to .355 inch for ease of use. As the first bottleneck commercial handgun cartridge since the early 1960s, the .357 SIG typically has a 125 grain bullet, matching the average weight of a .357 Magnum bullet, and achieves an average velocity of 1,350 feet per second with a muzzle energy of over 500 foot-pound force. Contrary to some sources, the .357 SIG casing, slightly longer and thicker than the .40 S&W, is more akin to a necked-down 10mm case.

How does .357 SIG Compare to Other Calibers?

Specification .357 SIG .40 S&W .357 Magnum 9mm
Bullet Diameter .355 inch .40 inch .357 inch .355 inch
Velocity 1,350 fps 1,130 fps 1,450 fps 1,180 fps
Muzzle Energy 506 ft·lbs 468 ft·lbs 583 ft·lbs 355 ft·lbs
Max Pressure (SAAMI) 40,000 psi 35,000 psi 35,000 psi 35,000 psi
Performance High speed, good penetration Decent speed, good damage High speed, high impact Low recoil, high capacity

357 SIG Ballistics: Chart of Average 357 SIG Ballistics

In its standard form, the .357 SIG features a bullet with a .355-inch diameter that fits into a .381-inch bottleneck. The cartridge base diameter measures .424 inch, while the case itself is .864 inch in length. With the bullet sitting in the bottleneck casing, the full length of the .357 SIG comes in at 1.140 inches.

When it comes to ballistics, the .357 SIG shows some significant numbers and, with a 125 gr bullet, can easily compete with the .357 Magnum. Although it’s a smaller casing, it’s still a powerhouse and great option for a self-defense round.

Note: This information comes from the manufacturer and is for informational purposes only. The actual ballistics obtained with your firearm can vary considerably from the advertised ballistics. Also, ballistics can vary from lot to lot with the same brand and type load.

357 Sig Bullet WEIGHT Muzzle VELOCITY (fps) Muzzle ENERGY (ft. lbs.) Mid-Range TRAJECTORY (in.) Barrel Length (in.)
  Muzzle 50 yds. 100 yds. Muzzle 50 yds. 100 yds. 50 yds. 100 yds.  
115 Grain 1520 n/a n/a 593 n/a n/a n/a n/a n/a
124 Grain 1450 n/a n/a 578 n/a n/a n/a n/a n/a
125 Grain 1350 1190 1080 510 395 325 0.7 3.1 4"
135 Grain 1225 1112 1031 450 371 319 n/a n/a 4"
147 Grain 1225 1132 1060 490 418 367 n/a n/a 4"
150 Grain 1130 1030 970 420 355 310 0.9 4 n/a

If you're looking for the best defense ammunition, check out our top picks for the best .357 SIG defense ammo.

Molly Carter
Written by
Molly Carter

Customer Reviews

Click To Purchase This 357 Sig Federal Ammunition
Federal 357 Sig Ammo - 50 Rounds of 125 Grain FMJ Ammunition
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  • Philip said:

    Excellent .357 sig ammo. Accurate range ammo.

  • Rob said:

    The 357 SIG ammo was great it handled and fired as expected every time. No mishaps and all rounds mostly hit the target every time unless I interfered... LOL Have recommend this product and your delivery to other friends...

  • spike said:

    Ammo arrived promptly and performed as expected.

  • Sam said:

    I feel that due to the few numbers per capita of the .357 Sig guns, the demand isn't so high which makes even the practice loads high in comparison to o ther calibers. This ammo shoots very well and is close to my carry load (Gold Dot) in felt recoil. Over all very good and I will buy more later. Cheers, Sam

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Click To Purchase This 357 Sig Sellier and Bellot Ammunition
Sellier and Bellot 357 Sig Ammo - 50 Rounds of 140 Grain FMJ Ammunition
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  • Steven said:

    It was a good value for target ammunition. They performed flawlessly. I will Buy them again.

Click To Purchase This 357 Sig Remington Ammunition
Remington 357 Sig Ammo - 50 Rounds of 125 Grain FMJ Ammunition
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  • Alexander Sabino said:

    Good quality ammo

  • Ammodude4u2 said:

    See summary above.