Winchester Defender 10mm Auto 180gr Bonded JHP Ammo - 20 Rounds

The Winchester Defender S10MMPDB delivers controlled expansion and deep penetration through its bonded jacket hollow point design. This 10mm Auto ammunition combines a 180-grain bonded bullet with Winchester's proven propellant technology for consistent terminal performance across various shooting scenarios.

What Makes This Different

The bonded jacket construction prevents core separation during expansion, maintaining bullet weight retention above 95% in ballistic gelatin tests. Standard hollow point bullets often fragment upon impact, reducing penetration depth and energy transfer. Winchester's bonding process chemically fuses the lead core to the copper jacket, creating a monolithic projectile that expands reliably while maintaining structural integrity through heavy clothing and intermediate barriers.

Key Features

• 180-grain bonded jacket hollow point bullet for maximum weight retention
• Nickel-plated brass cases resist corrosion and ensure smooth feeding
• Low-flash propellant reduces muzzle signature in low-light conditions
• Consistent velocities averaging 1,180 fps from 5-inch barrel
• Engineered expansion diameter of 0.65-0.70 inches in ballistic gelatin
• Compatible with all 10mm Auto chambered firearms
• Boxer-primed cases suitable for reloading

Field testing demonstrates reliable function in both semi-automatic pistols and revolvers chambered in 10mm Auto. The cartridge maintains accuracy within 2-inch groups at 25 yards from quality firearms, making it suitable for personal protection, hunting medium game, and competitive shooting applications. The nickel-plated cases feed smoothly through semi-automatic actions and extract cleanly without excessive fouling.

Technical Specs

• Caliber: 10mm Auto
• Bullet Weight: 180 grains
• Bullet Type: Bonded Jacket Hollow Point (JHP)
• Muzzle Velocity: 1,180 fps (5-inch barrel)
• Muzzle Energy: 556 ft-lbs
• Case Material: Nickel-plated brass
• Primer: Boxer-type, non-corrosive
• Quantity: 20 rounds per box, 10 boxes per case
• Manufacturer: Winchester Ammunition

Winchester's quality control standards ensure consistent performance across production lots, with velocity variations typically within 25 fps. The Defender line represents Winchester's commitment to reliable defensive ammunition that performs when accuracy and stopping power matter most.