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357 SIG

Here is the most important thing you can know about 357 SIG ammo: it is not compatible with 357 Magnum firearms. The 357 SIG was developed to emulate the 357 Magnum’s ballistic performance and striking energy, but its rimless bottleneck case is specifically designed for compatibility with semi-automatic firearms. Several law enforcement agencies have issued 357 SIG firearms in the past – the reason why it is predominantly popular with active and retired police officers. Take a look at our in-stock 357 Sig ammo options below.
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13 Items

  1. 1000rds – 357 Sig Federal American Eagle 125gr. FMJ Ammo 1000rds – 357 Sig Federal American Eagle 125gr. FMJ Ammo
    $569.95
    $0.57/ppr

    3 In Stock

    Bullet type
    Full Metal Jacket (FMJ)     Muzzle Energy
    506     Casing Type
    Brass     Muzzle Velocity
    1350     Primer Type
    Boxer     Bullet Weight
    125 Grain
  2. 1000rds - 357 Sig Speer Lawman 125gr. TMJ Ammo 1000rds - 357 Sig Speer Lawman 125gr. TMJ Ammo
    $569.95
    $0.57/ppr

    ☆☆☆☆☆ 1 Review

    42 In Stock

    ☆☆☆☆☆ 1 Review

    Bullet type
    Total Metal Jacket (TMJ)     Muzzle Energy
    506     Casing Type
    Brass     Muzzle Velocity
    1350     Primer Type
    Boxer     Bullet Weight
    125 Grain
  3. 50rds - 357 Sig Federal American Eagle 125gr. FMJ Ammo 50rds - 357 Sig Federal American Eagle 125gr. FMJ Ammo
    $28.95
    $0.58/ppr

    104 In Stock

    Bullet type
    Full Metal Jacket (FMJ)     Muzzle Energy
    506     Casing Type
    Brass     Muzzle Velocity
    1350     Primer Type
    Boxer     Bullet Weight
    125 Grain
  4. 50rds - 357 Sig Speer Lawman 125gr. TMJ Ammo 50rds - 357 Sig Speer Lawman 125gr. TMJ Ammo
    $29.95
    $0.60/ppr

    183 In Stock

    Bullet type
    Total Metal Jacket (TMJ)     Muzzle Energy
    506     Casing Type
    Brass     Muzzle Velocity
    1350     Primer Type
    Boxer     Bullet Weight
    125 Grain
  5. 1000rds - 357 Sig Sellier & Bellot 140gr FMJ Ammo 1000rds - 357 Sig Sellier & Bellot 140gr FMJ Ammo
    $599.95
    $0.6/ppr

    1 In Stock

    Bullet type
    Full Metal Jacket (FMJ)     Muzzle Energy
    568     Casing Type
    Brass     Muzzle Velocity
    1352     Primer Type
    Boxer     Bullet Weight
    140 Grain
  6. 50rds - 357 Sig Winchester USA 125gr. FMJ Ammo 50rds - 357 Sig Winchester USA 125gr. FMJ Ammo
    $30.95
    $0.62/ppr

    37 In Stock

    Bullet type
    Full Metal Jacket (FMJ)     Casing Type
    Brass     Muzzle Velocity
    1350     Primer Type
    Boxer     Bullet Weight
    125 Grain
  7. 50rds - .357 Sig Sellier & Bellot 140gr. FMJ Ammo 50rds - .357 Sig Sellier & Bellot 140gr. FMJ Ammo
    $31.95
    $0.64/ppr

    ☆☆☆☆☆ 2 Reviews

    69 In Stock

    ☆☆☆☆☆ 2 Reviews

    Bullet type
    Full Metal Jacket (FMJ)     Muzzle Energy
    568     Casing Type
    Brass     Muzzle Velocity
    1352     Primer Type
    Boxer     Bullet Weight
    140 Grain
  8. 50rds - 357 Sig Prvi Partizan 125gr. FPJ Ammo 50rds - 357 Sig Prvi Partizan 125gr. FPJ Ammo
    $31.95
    $0.64/ppr

    38 In Stock

    Bullet type
    Full Metal Jacket (FMJ)     Muzzle Energy
    660     Casing Type
    Brass     Muzzle Velocity
    1541     Primer Type
    Boxer     Bullet Weight
    125 Grain
  9. 50rds – 357 Sig Speer Lawman Clean-Fire 125gr. TMJ Ammo 50rds – 357 Sig Speer Lawman Clean-Fire 125gr. TMJ Ammo
    $33.95
    $0.68/ppr

    117 In Stock

    Bullet type
    Total Metal Jacket (TMJ)     Muzzle Energy
    506     Casing Type
    Brass     Muzzle Velocity
    1350     Primer Type
    Boxer     Bullet Weight
    125 Grain
  10. 50rds – 357 SIG Speer Gold Dot LE 125gr. JHP Ammo 50rds – 357 SIG Speer Gold Dot LE 125gr. JHP Ammo

    $40.95

    $34.95

    $0.70/ppr

    90 In Stock

    Bullet type
    Jacketed Hollow-Point (JHP)     Muzzle Energy
    525     Casing Type
    Nickel-Plated Brass     Muzzle Velocity
    1375     Primer Type
    Boxer     Bullet Weight
    125 Grain
  11. 50rds - 357 Sig Federal LE Tactical HST 125gr. Hollow Point Ammo 50rds - 357 Sig Federal LE Tactical HST 125gr. Hollow Point Ammo
    $40.95
    $0.82/ppr

    ☆☆☆☆☆ 7 Reviews

    80 In Stock

    ☆☆☆☆☆ 7 Reviews

    Bullet type
    Jacketed Hollow-Point (JHP)     Muzzle Energy
    513     Casing Type
    Nickel-Plated Brass     Muzzle Velocity
    1360     Primer Type
    Boxer     Bullet Weight
    125 Grain
  12. 20rds – 357 Sig Hornady Critical Duty 135gr. FlexLock Ammo 20rds – 357 Sig Hornady Critical Duty 135gr. FlexLock Ammo
    $34.95
    $1.75/ppr

    20 In Stock

    Bullet type
    Jacketed Hollow-Point (JHP)     Muzzle Energy
    450     Casing Type
    Nickel-Plated Brass     Muzzle Velocity
    1225     Primer Type
    Boxer     Bullet Weight
    135 Grain
  13. 20rds – 357 Sig Federal Personal Defense HST 125gr. JHP Ammo 20rds – 357 Sig Federal Personal Defense HST 125gr. JHP Ammo
    $35.95
    $1.8/ppr

    ☆☆☆☆☆ 1 Review

    12 In Stock

    ☆☆☆☆☆ 1 Review

    Bullet type
    Jacketed Hollow-Point (JHP)     Muzzle Energy
    513     Casing Type
    Nickel-Plated Brass     Muzzle Velocity
    1360     Primer Type
    Boxer     Bullet Weight
    125 Grain

13 Items

More fromThe Lodge

See how 357 Sig compares to the more common 357 Magnum cartridge. Check out AmmoToGo.com's blog about ammo, guns and shooting.

357 Sig vs. 357 Magnum – What’s the Difference?

357 Magnum vs. 357 SIG: These two calibers sound similar and while the performance can be about the same, they have very different uses.

Read at the Lodge

More 357 Sig ammo resources Read our in-depth ammo guides to get the most out of your ammunition and range time as well as see if other calibers might be better for your needs.

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More on 357 Sig Ammo

Is there a Difference Between .357 Sig and the .357 Magnum?

Yes. While they both use the “.357” monicker, these are two cartridges that are distinct and unique. Compared to .357 Magnum ammo, the .357 Sig has different dimensions for bullet diameter, case diameter and rim diameter. The most notable difference is the narrow neck of the .357 Sig, which is “necked-down,” meaning the case is wider and narrows at the front before wrapping around the bullet. Because of the unique shape, as well as the different dimensions, the .357 Sig and .357 Magnum are not interchangeable at all. Get more details about 357 sig vs. 357 mag calibers here.

What is the Purpose of the Narrow Neck?

The most distinct feature of the .357 Sig ammo is the presence of the shoulders. Basically, the cartridge case is wider towards the back and then narrows to form what could be described as a shoulder and neck. The .357 Sig was based on a wider cartridge that was fitted to hold a smaller bullet. The result was that with a wider cartridge, more propellant could be packed behind the lighter projectile, creating superior velocities without lengthening the cartridge itself. Because of the unique shape (most handgun ammo is not necked), the .357 Sig remains a bit of an oddity in the firearms industry.

How Does .357 Sig Ammo Compare to the 9mm Luger?

The .357 Sig uses a bullet that is similar in diameter to the 9mm Luger. However, the 9mm Luger does not have the necking, and has a smaller case diameter. The increase in case diameter, and hence the amount of propellant, means the .357 Sig is generally faster and more powerful than the 9mm Luger.

How Does the .357 Sig Compare to the 10mm Auto?

At the base, the cartridges are similar in size, but the .357 Sig narrows towards the front and holds a bullet that is smaller in diameter. Because of the narrowed neck, the .357 Sig has a narrower bullet that is generally smaller in overall weight. The .357 Sig tends to be slightly faster in muzzle velocity, although the 10mm Auto generally delivers stronger muzzle energy, due in large part to the heavier bullet.

Can the .357 Sig Be Used for Self Defense?

Absolutely. .357 Sig ammunition is perfectly capable of providing effective self defense. With ballistics that make is comparable to many other popular rounds, the .357 Sig, however obscure, can be extremely effective when called upon. If purchasing this ammo for personal protection, select expanding rounds such as jacketed hollow points or soft points.

Recent 357 SIG Reviews

  • ☆☆☆☆☆
    I love HST 9mm and 45 Auto. When my 357sig ammo (Gold Dot) ran out, I could not find HST 357sig at my usual suppliers, but I found it at AmmoToGo at a price similar to HST 9, so I have found a new ammo supplier.
    Tom S. on 50rds - 357 Sig Federal LE Tactical HST 125gr. Hollow Point Ammo
  • ☆☆☆☆☆
    This is some serious stuff. It’ll put down some bad hombres.
    Brett M on 20rds – 357 Sig Federal Personal Defense HST 125gr. JHP Ammo
  • ☆☆☆☆☆
    They work well... and make a big mess....
    ASF on 20rds - 357 SIG G2 Research RIP 92gr. HP LF Ammo
  • ☆☆☆☆☆
    Absolutely incredible ammunition. Have carried my German Sig P229 since 1996 cal .357 sig. Like this weapon so much purchased a second German P229 which remains unfired today. Chronographs at just over 1400 f.p.s. with Hornady load. Just below 1400 f.p.s. with Speer Gold dot. A former deputy sheriff I remember well the transition between the .357 mag and the 9 m/m. In the transition period, (1980's) the 9 m/m ammo had a bad reputation for stopping power. Not today, however the .357 Sig easily eclipses any 9m/m load out there. If loaded where it should be, the 9 m/m suffers an easy 200 / 250 f.p.s. to the .357 Sig. Accuracy wise the .357 Sig easily outperforms the 9 m/m. .357 Sig also much more snappy! Secret Service loves it, U.S. Air Marshalls love it, Texas Rangers love it. I love it. "Nuff said.
    Tim Hardy on 50rds - 357 Sig Federal LE Tactical HST 125gr. Hollow Point Ammo