Winchester S357MPDB Defender 357 Magnum 125gr Bonded JHP Ammo

The Winchester S357MPDB Defender delivers reliable expansion and deep penetration for personal defense applications. This 357 Magnum ammunition features a 125-grain bonded jacket hollow point bullet engineered to maintain weight retention through barriers while providing consistent terminal performance.

What Makes This Different

The bonded jacket construction prevents core separation that commonly occurs with standard hollow point bullets when encountering clothing, glass, or light barriers. Winchester's bonding process mechanically locks the lead core to the copper jacket, ensuring the bullet maintains structural integrity and weight retention of 95% or greater. This translates to deeper penetration and more reliable expansion compared to conventional jacketed hollow points that may fragment prematurely.

Key Features

• 125-grain bonded jacket hollow point bullet for controlled expansion
• Nickel-plated brass cases resist corrosion and aid smooth feeding
• Clean-burning powder reduces fouling in revolver cylinders
• Consistent muzzle velocity of 1,450 fps from 4-inch barrel
• 20 rounds per box, 10 boxes per case (200 total rounds)
• Compatible with all 357 Magnum and 357 Maximum revolvers
• Non-corrosive primers ensure long-term storage reliability

This ammunition performs effectively in both law enforcement duty revolvers and civilian self-defense firearms. The 125-grain bullet weight provides manageable recoil while delivering sufficient energy transfer for stopping threats. Testing demonstrates consistent expansion to approximately 0.60 inches in ballistic gelatin, with penetration depths of 12-15 inches meeting FBI protocol standards. The nickel-plated cases function reliably in high-round-count training scenarios and resist tarnishing during extended storage.

Technical Specs

• Caliber: 357 Magnum
• Bullet Weight: 125 grains
• Bullet Type: Bonded Jacket Hollow Point (BJHP)
• Muzzle Velocity: 1,450 fps (4-inch barrel)
• Muzzle Energy: 583 ft-lbs
• Case Material: Nickel-plated brass
• Primer: Non-corrosive
• Packaging: 20 rounds per box, 10 boxes per case
• Manufacturer: Winchester Ammunition

Professional shooters and law enforcement agencies rely on Winchester Defender ammunition for situations where failure is not an option. The proven bonded bullet technology and quality control standards make this ammunition a dependable choice for those who demand consistent performance when it matters most.