Description
Armscor USA .357 Magnum 158 Grain Full Metal Jacket (FMJ) Ammo
Reliable USA-made .357 Magnum target ammunition engineered for high-volume range training, plinking, and target shooting. Armscor USA 158gr FMJ combines reloadable brass cases, non-corrosive Boxer primers, and full metal jacket projectiles for smooth feeding and clean shooting.
Product Overview
Armscor USA .357 Magnum 158 grain ammo is manufactured in the United States, offering exceptional value for target shooters, range practice, and lever-action carbine enthusiasts. Designed to deliver consistent accuracy and reliable ignition, this round features a 158-grain Full Metal Jacket (FMJ) bullet that reduces lead fouling and barrel wear over extended training sessions.
At 1,875 fps, this round generates 1,233 ft-lbs of muzzle energy, producing realistic magnum performance for training and tactical drill practice. Armscor uses high-quality reloadable brass casings and clean-burning non-corrosive Boxer primers to ensure smooth cylinder cycling, reliable extraction, and dependable functioning across both revolver and rifle platforms.
Technical Specifications
| Brand / Manufacturer | Armscor USA[span_1](start_span)[span_1](end_span) |
| Manufacturer Part # | FAC357N-1 / FAC357[span_2](start_span)[span_2](end_span) |
| Caliber | .357 Magnum (.357 Mag)[span_3](start_span)[span_3](end_span) |
| Bullet Weight | 158 Grain[span_4](start_span)[span_4](end_span) |
| Bullet Type | Full Metal Jacket (FMJ)[span_5](start_span)[span_5](end_span) |
| Muzzle Velocity | 1,875 fps |
| Muzzle Energy | 1,233 ft-lbs |
| Ballistic Coefficient (G1) | 0.170 |
| Casing Material | Brass[span_6](start_span)[span_6](end_span) |
| Primer Type | Boxer, Non-Corrosive |
| Primary Use | Target Practice, Range Training, Plinking |
| Rounds per Box | 50[span_7](start_span)[span_7](end_span) |
Ballistic Performance Data
| Distance | Velocity (fps) | Energy (ft-lbs) |
|---|---|---|
| Muzzle | 1,875 | 1,233 |
Muzzle data per manufacturer specifications measured from test barrels[span_8](start_span)[span_8](end_span). Velocities from shorter revolver barrels or longer lever-action carbines will vary. Downrange figures are not published for this load.
Key Benefits
- Economical Training Load: High-value 50-round box packaging designed for budget-conscious range training and high-volume target shooting[span_9](start_span)[span_9](end_span).
- Full Metal Jacket Bullet: Encloses the projectile core to reduce bore lead fouling and maintain barrel accuracy[span_10](start_span)[span_10](end_span).
- Made in the USA: Produced under strict quality controls for dependable performance and consistent lock-time[span_11](start_span)[span_11](end_span).
- Reloadable Brass Casings: Premium brass cases with Boxer primers offer great durability and value for reloading enthusiasts[span_12](start_span)[span_12](end_span).
Compatibility & Usage Notes
This ammunition is intended for firearms chambered in .357 Magnum that are in good working condition[span_13](start_span)[span_13](end_span). Do not attempt to load or fire .357 Magnum ammunition in firearms designated solely for .38 Special, as higher chamber pressures can cause firearm damage or severe personal injury. Store ammunition in a cool, dry place away from children and unauthorized users.
Frequently Asked Questions
Can I fire Armscor USA .357 Magnum in a .38 Special revolver?
No. The .357 Magnum casing is longer and loaded to significantly higher pressures than .38 Special. Firing .357 Magnum ammunition in a firearm chambered only for .38 Special is unsafe and the cartridge will not fully chamber.
Is Armscor .357 Magnum brass reloadable?
Yes. Armscor uses standard non-corrosive Boxer primers in reloadable brass casings[span_14](start_span)[span_14](end_span). Inspect cases for cracks or stretching before handloading.
Is Full Metal Jacket (FMJ) ammo good for personal defense?
FMJ ammunition is designed primarily for target practice, range training, and plinking because it does not expand upon impact[span_15](start_span)[span_15](end_span). For personal defense, hollow point (JHP) or soft point (JSP) rounds are recommended.
