357 SIG

.357 Sig ammo was jointly designed by Swiss firearms manufacturer Sig Sauer and the Federal Cartridge Corporation. The intent of the designers was a cartridge comparable to the .357 Magnum and capable of firing from semi-automatic handguns.

The .357 Sig round is derived from the case of the .40 S&W, necked-down and slightly elongated. This bottlenecked case design makes .357 Sig ammunition exceptionally reliable when feeding in semi-automatic firearms.

While the original ammunition utilized a .357 diameter bullet, the design was quickly revised to utilize .355 caliber (9mm) bullets which are typically shorter than standard 9mm bullets due to the length of the case neck. Most bullets used in .357 Sig are truncated cones, whether FMJ or hollow-point.

Common weights for .357 Sig projectiles are 115-grain, 125-grain and 147-grain. The heavier bullets are capable of exceeding 1200 feet per second muzzle velocity out of common barrel lengths, while the lighter bullets can reach over 1600 feet per second. Muzzle energy for the various loadings ranges from just below 500 foot-lbs to over 600 foot-lbs.

Adopted by numerous law enforcement agencies, including the Texas Highway Patrol, US Secret Service and Federal Air Marshals, .357 Sig ammo is ideally suited to duty and personal defense. Its combination of weight and velocity marks it as a hard-hitting caliber, while its notable case dimensions make it one of the most reliable pistol calibers in existence.

Check out our in-stock 357 Sig ammo for sale below from major manufacturers like Federal, Sig Sauer and others:

show description
Filter By:
per page

4 Item(s)

  1. 50rds - 357 Sig Winchester Ranger 125gr. Bonded Hollow Point Ammo 50rds - 357 Sig Winchester Ranger 125gr. Bonded Hollow Point Ammo

    ☆☆☆☆☆ 1 Review(s)

    $31.95
    $0.64/ppr

    60 In Stock

  2. 50rds – 357 SIG Speer Gold Dot LE 125gr. JHP Ammo 50rds – 357 SIG Speer Gold Dot LE 125gr. JHP Ammo
    $39.95
    $0.80/ppr

    21 In Stock

  3. 50rds - 357 Sig Federal LE Tactical HST 125gr. Hollow Point Ammo 50rds - 357 Sig Federal LE Tactical HST 125gr. Hollow Point Ammo

    ☆☆☆☆☆ 5 Review(s)

    $40.00
    $0.80/ppr

    145 In Stock

  4. 20rds – 357 Sig Hornady Critical Duty 135gr. FlexLock Ammo 20rds – 357 Sig Hornady Critical Duty 135gr. FlexLock Ammo
    $22.95
    $1.15/ppr

    40 In Stock

per page

4 Item(s)

Recent 357 SIG Reviews

  • ☆☆☆☆☆
    While I’ve never had to use this for its intended purpose I have shot enough of this ammo at the range to feel like it would perform well if the need arose. It’s shoots well and accurately in both my Sig P239 and Glock 23 (with a 357 drop in barrel). I can’t discern much difference recoil wise between the 40, the 9mm and the 357 Sig. Is it louder? I wear ear pro so how can I tell?! Many LE officers like the 357 Sig so I’ll defer to their judgement. A 357 Sig with a spare mag sleeps in my bed stand but when the ATF gets around to granting me my tax stamp the nightstand gun will be a suppressed 9mm......probably a CZ Scorpion Evo 3 S1, Obsidian 45 suppressor, 30 rd mag with a full spare and a light......it’s a crazy world these days! My life matters ???? So.....I digress. The Winchester ammo works just fine.
    John T Turner on 50rds - 357 Sig Winchester Ranger 125gr. Bonded Hollow Point Ammo
  • ☆☆☆☆☆
    These rounds have unrivaled velocity, energy transfer, accuracy and the round in most cases stays in the target absorbing all the energy being transferred. Not to mention being frangible round it disintegrates and leaves lol or nothing for ballistics.
    Jeff loiselle on 20rds - 357 Sig RBCD Performance Plus 60gr. Total Fragmenting SP Ammo
  • ☆☆☆☆☆
    Awesome ammo feeds nice. Shipping was very fast.
    Les on 500rds - 357 Sig Remington UMC 125gr. FMJ Ammo
  • ☆☆☆☆☆
    I found the ammunition to be exceptional in both price and quality. I have fired only about 100 rounds with no problems (firing other calibers as well). 357 sig ammo is over priced in our local gun stores, so this was really an opportunity to purchase some quality ammo for range practice. I will be returning to this company again in the future for my ammo needs. On yeah, the delivery was so fast, I thought the truck had stopped at the wrong address.
    Richard H Sweat on 1000rds - 357 Sig Speer Lawman 125gr. TMJ Ammo