Description
Cor-Bon's 125 grain 357 Magnum load represents what the company built its reputation on: high-velocity ammunition engineered specifically for self-defense use. When Cor-Bon started back in 1982, the founder noticed that many hollow point designs at the time would either plug up with clothing and fail to expand, or pass through without transferring energy. This load was designed to solve that problem through velocity and precision bullet design.
What Makes Cor-Bon's 357 Magnum Load Different
The round leaves the muzzle at 1400 feet per second, delivering 544 foot-pounds of energy from a 4-inch barrel. That velocity combined with Cor-Bon's exclusively designed jacketed hollow point bullet means the projectile expands quickly and reliably. Testing in 10% ballistic gelatin shows expansion that's consistently double the original diameter, and penetration that ranges between 9 and 15 inches depending on what the round encounters. This balance is deliberate: rapid energy transfer means you get reliable performance without over-penetration.
357 Magnum Revolver Performance
The 125 grain weight is the classic choice for 357 Magnum work. It's light enough to achieve high velocity in revolver barrels, yet heavy enough to maintain energy and penetration. The bullet jacket is strategically scored to ensure controlled and immediate expansion on impact. You get new production brass with Boxer primers, so if you reload, these cases are reloadable.
Each box contains 20 rounds. This is purpose-built ammunition for defensive carry, duty use, or training with the gun you trust for personal protection.
Key Specifications
- Caliber: .357 Magnum
- Bullet Weight: 125 Grains
- Bullet Type: Jacketed Hollow Point (JHP)
- Rounds per Box: 20
- Muzzle Velocity: 1400 fps
- Muzzle Energy: 544 ft-lbs
- Case Type: Brass
- Primer Type: Boxer
- Reloadable: Yes
- Corrosive: No
- Manufacturer: Cor-Bon
- MPN: SD357125/20
- UPC: 757750357082
What’s Included
- 20 rounds of 357 Magnum 125 grain JHP ammunition
Frequently Asked Questions
What makes Cor-Bon's 357 Magnum load suitable for self-defense?
The high velocity combined with Cor-Bon's designed hollow point bullet delivers reliable expansion and rapid energy transfer. Testing shows consistent double-diameter expansion with 9 to 15 inches of penetration, which provides effective terminal performance without excessive over-penetration.
Can I reload these 357 Magnum cases?
Yes. These come in new production brass with Boxer primers, making them fully reloadable if you handload your own ammunition.
How does 125 grain compare to heavier 357 Magnum loads?
The 125 grain weight allows high velocity in revolver barrels while maintaining adequate energy and penetration for defensive use. It's the classic choice for 357 Magnum self-defense work and balances speed with stopping power.
Is this ammunition non-corrosive?
Yes, this is non-corrosive ammunition with standard primers and clean-burning powders, so your revolver stays in good condition with regular use.







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