Ammo Inc Signature 357 Magnum 158gr FMJ Ammunition - 50 Rounds

The Ammo Inc Signature 357 Magnum 158gr Full Metal Jacket ammunition delivers consistent performance for target shooting and training applications. This precision-manufactured cartridge features a 158-grain full metal jacket bullet that provides reliable feeding and clean penetration through various target media.

What Makes This Different

Ammo Inc's Signature line utilizes premium brass cases and temperature-stable powder formulations that maintain velocity consistency across temperature ranges. The 158-grain FMJ bullet design offers superior weight retention compared to lighter projectiles, while the full metal jacket construction minimizes lead fouling in barrel rifling. Quality control processes ensure each cartridge meets strict dimensional tolerances for optimal chamber fit and extraction.

Key Features

• 158-grain full metal jacket bullet for consistent expansion and penetration
• Premium brass cases with reinforced case heads for reliable extraction
• Temperature-stable powder loads maintaining ±25 fps velocity variation
• Boxer-primed cases suitable for reloading applications
• 50-round boxes packaged in 20-box cases for bulk purchasing
• Compatible with all .357 Magnum and .357 Maximum chambered firearms
• Clean-burning powder formulation reducing fouling buildup

Range testing demonstrates consistent muzzle velocities averaging 1,240 fps from 4-inch barrels, with standard deviations typically under 20 fps. The 158-grain weight provides excellent momentum transfer for steel target applications while maintaining flat trajectories out to 100 yards. This ammunition functions reliably in both revolver and lever-action rifle platforms, cycling smoothly through various action types without feeding issues.

Technical Specs

• Caliber: .357 Magnum
• Bullet Weight: 158 grains
• Bullet Type: Full Metal Jacket (FMJ)
• Case Material: Brass with boxer primer
• Muzzle Velocity: 1,240 fps (4-inch barrel)
• Muzzle Energy: 539 ft-lbs
• Package: 50 rounds per box, 20 boxes per case
• Manufacturer: Ammo Inc, USA

This bulk packaging option provides serious shooters with consistent ammunition for extended training sessions and competition preparation. The combination of proven 158-grain bullet weight and quality manufacturing standards makes this an economical choice for high-volume shooting applications.