The .357 SIG cartridge offers some rather compelling advantages for serious use… particularly in law enforcement, self-defense, and other tactical applications. Here’s why:

1. Superior Ballistic Performance: The .357 SIG delivers outstanding muzzle velocity, typically between 1,350 to 1,450 fps with 125-grain loads, and energy around 500 ft-lbs. Which somewhat mimics the famous (for good reasons) .357 Magnum revolver round, but in a small-framed semi-automatic pistol. This provides excellent stopping power and penetration, critical for effective threat engagement.

2. Flat Trajectory and Accuracy: The high velocity results in a flatter trajectory compared to other handgun rounds like 9mm or .40 S&W, enhancing accuracy at longer ranges (up to 50 yards). This makes it ideal for scenarios where precision is crucial. And with a projectile that gets to the target in a hurry… It makes hitting a moving target so much easier.

3. Barrier Penetration: The .357 SIG performs very well against common barriers, such as windshields, Vehicle Doors, and such… And with a good projectile choice, and can still perform in an acceptable manner on Soft Targets after the barrier is defeated.

4. Getting One: I’m not sure if any gun company is currently producing anything in .357 SIG anymore, one might thing the cartridge is “Dead”. This is untrue. Since the cartridge is based on the .40 S&W, you can convert most any .40 cal pistol to a .357 with a simple barrel swap, and new and used .40s are out there in the wild on gun store shelves just waiting to be picked up. And you’re going to find these lonely pistols rather well discounted. MidwayUSA or Brownells, Inc. or Lone Wolf Distributors will probably have a barrel for that pistol, in .357, and they can mail that directly to your door.

5. Ammo can be found online as well, through reputable dealers, and that too can be shipped directly to your door. So there is no problem finding this stuff. Balance of Power and Capacity: While it carries slightly fewer rounds than 9mm in similar-sized magazines, the .357 SIG offers a better balance of power per shot compared to 9mm and similar capacity to .40 S&W, making it a practical choice for those prioritizing terminal performance over maximum round count.

Drawbacks: Higher recoil and cost are the downsides. However, modern training mitigates recoil management issues, and the cartridge’s performance justifies the cost for users prioritizing effectiveness over economy. It’s more expensive than 9mm to be sure. But that’s due to the Economy of Scale, it is the same as with .45. Fewer people are buying .357 SIG and that means factories are producing less of it. The upshot, in the last 3 Ammo Runs, where people are panic buying and emptying shelves… .357 SIG is one of the last pistol calibers to be snatched up. So you got that going for you.
The other drawback to the .357 SIG is that it is a High Pressure Round. It’s loud. It’s going to hurt your ears. You want to put your Ear Pro with the Gun in your Go Bag or in your Night Stand Safe. It’s unpleasant to shoot. It’s not a FUN cartridge. It’s not one to pass around on Range Day. This is a cartridge to get things done with.

.357 SIG is not Dead. It’s just Underappreciated.