Magtech Sport Shooting .357 Magnum 125 Grain Full Metal Jacket Flat (MPN: 357Q)
Revolver marksmen and lever-action carbine shooters looking for high-energy target performance often run into a common issue: finding a full-power .357 Magnum round that offers flat trajectories and clean feeding without causing severe barrel lead-fouling or forcing-cone erosion. Magtech developed their Sport Shooting 125-grain Full Metal Jacket Flat (FMJF) cartridge to directly address this challenge. Engineered for high-volume practice, action shooting competition, and range conditioning, this load provides shooters with authentic magnum velocities, crisp point-of-impact consistency, and clean barrel operation.
At the center of Magtech’s manufacturing quality is a 125-grain flat-nose full metal jacket bullet. The jacketed construction completely encases the lead core, preventing lead vapor and barrel throat deposits, while the truncated flat-nose profile punches distinct edges into paper targets and transfers kinetic energy efficiently to steel plates. Magtech loads these projectiles into factory-fresh, heavy-walled reloadable brass cases charged with clean-burning propellants and non-corrosive boxer primers, ensuring reliable cylinder indexing and smooth primer seating under full magnum pressures.
Out on the range, expect snappy slide or cylinder cycling and a flat downrange flight path. Leaving the muzzle at a blistering ~1,378 FPS out of standard revolver barrels, this 125-grain payload delivers hard-hitting impact while maintaining controllable muzzle rise for rapid sight realignments. The high-grade drawn brass cases provide smooth ejector-rod stroke and positive extraction across double-action revolvers, single-actions, and lever-action tubular magazines, making this 50-round box a benchmark choice for high-volume target shooting.
Armorer Bench Notes & Technical Maintenance Guidance
Shipping Restrictions: Ammunition sales are strictly regulated. Check all state and local laws prior to ordering. Cannot ship to PO Boxes, APO/FPO addresses, or internationally. Must ship via ORM-D / Hazardous Ground transport.
Armorer Tip: High-velocity 125gr .357 Magnum loads generate substantial blast pressure at the cylinder gap. Regularly inspect the top strap and forcing cone of light-frame revolvers for flame cutting or carbon buildup. When running flat-nose FMJ cartridges in tubular-magazine lever guns, verify smooth elevator feeding, and always ensure rounds are seated to standard overall length (OAL) to prevent action jams.
Key Features
- Full Metal Jacket Flat Profile: Encased lead core eliminates lead fouling while the flat nose leaves clear target markings and feeds reliably in lever-actions.
- High-Velocity Target Performance: Drives a 125gr projectile at ~1,378 FPS for flat trajectories and energetic steel plate knockdowns.
- Clean-Burning Propellants: Specially formulated powders minimize carbon fouling in cylinder gaps and action mechanisms.
- Heavy-Duty Reloadable Brass: Precision-drawn brass cases ensure uniform wall thickness and multiple reloading lifecycles.
- Non-Corrosive Primer Ignition: Premium boxer primers provide instantaneous, weather-reliable ignition across all seasons.
Product Specifications
- Brand: Magtech Ammunition
- Product Line: Sport Shooting / Target & Range
- MPN: 357Q
- UPC: 754908184217
- Caliber / Gauge: .357 Magnum (.357 Mag)
- Bullet Weight: 125 Grain
- Bullet Type: Full Metal Jacket Flat (FMJF / Truncated Cone)
- Muzzle Velocity: ~1,378 FPS
- Muzzle Energy: ~527 ft-lbs
- Casing Material: Brass (Reloadable)
- Primer Type: Boxer (Non-Corrosive)
- Box Quantity: 50 Rounds per Box
- Case Quantity: 1,000 Rounds (20 Boxes)
