Underwood 10mm 115gr Xtreme Defender Platinum

Underwood Xtreme Defender Platinum: Purpose-Built Performance

The Xtreme Defender Platinum represents a significant advancement in 10mm self-defense and hunting ammunition. Built on Underwood's proven Xtreme Penetrator platform, this load combines engineering precision with real-world stopping power.

Ballistic Performance

• Velocity: 1700 feet per second
• Muzzle Energy: 738 foot-pounds
• Bullet Weight: 115 grains
• Bullet Material: Solid copper construction
• Sectional Density: 0.103 (excellent penetration characteristics)

Superior Wound Characteristics

The optimized nose flute design creates a permanent wound cavity over 100% larger than competing expanding hollow points. Penetration reaches approximately 18 inches—ideal for reliable performance through intermediate barriers without sacrificing terminal effectiveness.

Barrier-Blind Performance

Unlike conventional hollow points that fail when passing through obstacles, the solid copper body maintains integrity through wallboard, sheet metal, and automotive glass. This barrier-blind capability ensures consistent performance in real-world defensive scenarios.

Premium Brass Cases

Nickel-plated brass casings offer multiple advantages: improved feeding reliability across all firearm actions, superior corrosion resistance compared to traditional brass, enhanced aesthetics, and easier cleanup during reloading. The nickel plating prevents tarnishing during storage and resists degradation from leather, moisture, and other materials.

Specifications

• Caliber: 10mm Auto
• Bullet Diameter: 0.40 inch
• Case Type: Nickel-plated brass, boxer-primed, reloadable
• Lead-Free: Yes
• Suppressor Safe: Yes
• Supersonic: Yes
• New Production: Non-corrosive
• Quantity: 20 rounds per box

Whether you're training, hunting, or preparing for self-defense, Underwood Xtreme Defender Platinum ammunition delivers the performance and reliability serious shooters demand.