Winchester USA Q4309 357 SIG 125gr FMJ Ammo - 50 Round Box

The Winchester USA Q4309 delivers consistent 357 SIG performance with 125-grain full metal jacket bullets designed for training and target applications. This ammunition provides reliable feeding and extraction in semi-automatic pistols while maintaining the flat trajectory and stopping power that made 357 SIG a preferred law enforcement cartridge.

What Makes This Different

Winchester's USA line focuses on value without compromising quality, using clean-burning powders and consistent primer ignition. The 125-grain FMJ bullet weight matches many premium defensive loads, allowing shooters to practice with similar ballistics at a fraction of the cost. Quality control standards ensure reliable ignition and consistent velocities across the entire production run.

Key Features

• 125-grain full metal jacket bullet for reliable feeding and reduced barrel fouling
• Clean-burning powder formulation minimizes residue buildup
• Boxer-primed brass cases suitable for reloading
• Consistent muzzle velocity approximately 1,350 fps from 4-inch barrel
• 50-round box packaging for convenient range sessions
• Compatible with all 357 SIG chambered firearms
• Non-corrosive primers for long-term storage reliability

Range performance remains consistent across temperature variations, with reliable cycling in popular platforms including SIG P229, Glock 31/32, and Smith & Wesson M&P357. The FMJ design penetrates standard targets cleanly while the brass cases eject consistently for easy cleanup. Indoor ranges typically approve this ammunition due to its lead-core, copper-jacketed construction.

Technical Specs

• Caliber: 357 SIG
• Bullet Weight: 125 grains
• Bullet Type: Full Metal Jacket (FMJ)
• Muzzle Velocity: ~1,350 fps (4-inch barrel)
• Muzzle Energy: ~506 ft-lbs
• Case Material: Boxer-primed brass
• Primer: Non-corrosive
• Quantity: 50 rounds per box
• Manufacturer: Winchester Ammunition

Winchester's reputation for consistent ammunition manufacturing ensures reliable performance whether used for qualification courses, competition practice, or recreational shooting. The 50-round box quantity provides sufficient ammunition for extended range sessions while remaining cost-effective for regular training schedules.