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Customer Reviews
Most Recent Reviews
GREAT AMMO by John, Verified Owner, October 26, 2025
They said you couldn’t make perfection, but Underwood just did it—big league! The .357 Sig 124 Grain is absolutely fantastic. Tremendous velocity, truly the best you can get. I’ve tried the so-called “premium” ammo, folks, but nobody compares. It’s p...
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Most Recent Reviews
another top quality Underwood product by rock, Verified Owner, November 14, 2023
I love these bullets the sig 357 is my favorite caliber and I have always been satisfied by Underwood. I have shot them at ballistics gel and they perform flawlessly. I have also Target shot these bullets and they shoot as well as the FMJ
Most Recent Reviews
357 Sig. Search by Cookie, November 12, 2023
I’ve been searching for 357Sig shells for a good time now. Everywhere I looked just couldn’t find them. Until I found this site. I just purchased 100 rounds. I’ll be buying more.
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Number of Rounds:
20

Code: 40U-LAP-A147-147

MPN: 147

UPC: 816874020644

List: $44.60Save 42%
$1.30/Round
$26.09

Product Info for Underwood Ammo .357 Sig 124 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammunition

Underwood Ammo standard Jacketed Hollow Point rounds are unrivaled. They use the Sierra Bullets projectiles, which feature skives designed to create a versatile handgun bullet for use in a variety of applications. The deep skives enhance the expansion characteristics of the bullet without sacrificing accuracy and reliable feeding. The skives in the jacket mouth create precise reliefs in the jacket, which allow for rapid, consistent, reliable expansion. This reliable expansion assures energy transfer and stopping power while limiting the likelihood of over-penetration.image

Nickel-plated brass casings, the nickel plating process provides several key benefits, not limited to but including; improved feeding in all actions of firearms enhanced corrosion resistance over traditional brass, improved cosmetics, and ease of cleanup during reloading. Nickel-plated casings will not tarnish like brass during storage or when in contact with foreign materials such as leather, moisture, and other metals. As with all of Underwood Ammo rounds, they utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light. While taking advantage of their state of the art testing equipment, this high-performance ammunition is field tested using popular, real firearms that Underwood Ammo's customers are most likely to own out in the real world with all the elements you would experience. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.

WARNING: California`s Proposition 65

Specifications for Underwood Ammo .357 Sig 124 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammunition:

Manufacturer: Underwood Ammo
Caliber: .357 SIG
Number of Rounds: 20
Bullet Type: Jacketed Hollow Point (JHP)
Bullet Weight: 124 grain
Cartridge Case Material: Nickel Plated Brass
Muzzle Velocity: 1475 ft/s
Muzzle Energy: 599 ft-lbs
Application: Hunting
Package Type: Box
Primer Style: Centerfire
Lead Free: No

Features of Underwood Ammo .357 Sig 124 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammunition

  • This ammo is a proven round for hunting.
  • The bullet in this product does contain lead.
  • This round is designed to be supersonic and travels faster than the speed of sound.
  • This product has been designed to be an effective choice for the ultimate in self-defense applications.
  • The bullet in this product has a Sectional Density, (SD) of 0.140561679938788. SD is the ratio of an object's mass to its cross sectional area with respect to a given axis. It conveys how well an object's mass is distributed (by its shape) to overcome resistance along that axis.
  • This ammo IS SAFE to use in a suppressor.
  • The bullet in this ammo has a ballistic coefficient (G1) of 0.118 - Generally, the higher the coefficient, the more stable the projectile will be in flight.

Package Contents:

  • Underwood Ammo .357 Sig 124 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammunition

Underwood Ammo .357 Sig 124 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammunition Orderable Models

List of Orderable Models

  • Underwood Ammo .357 Sig 124 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 147 , MPN: 147 , UPC: 816874020644 , Code: 40U-LAP-A147-147
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