Underwood Xtreme Defender 10mm 115gr Solid

Underwood Xtreme Defender: Purpose-Built for Self-Defense

The Xtreme Defender represents a significant advancement in defensive ammunition design. Built on the proven Xtreme Penetrator platform, this round combines solid copper construction with optimized ballistics to deliver reliable performance when it matters most.

Performance Characteristics

Penetration and Wound Cavity

• Achieves up to 18 inches of penetration depth
• Creates a permanent wound cavity over 100% larger than conventional expanding hollow points
• Maintains expansion even after passing through barriers—wallboard, sheet metal, and automotive glass have no effect on performance

Ballistic Specifications

• Caliber: 10mm Auto
• Bullet Weight: 115 grains
• Velocity: 1700 feet per second
• Muzzle Energy: 738 foot-pounds
• Ballistic Coefficient: Optimized for stable flight
• Sectional Density: 0.103 (excellent mass distribution)

Construction and Reliability

Solid Copper Design The monolithic copper bullet eliminates the separation issues common to traditional jacketed rounds. This solid construction ensures consistent performance regardless of what the bullet encounters.

Nickel-Plated Brass Cases Underwood's nickel plating process delivers multiple advantages: improved feeding reliability across all firearm actions, superior corrosion resistance compared to traditional brass, enhanced appearance, and easier cleanup during reloading. Nickel-plated cases resist tarnishing during storage and maintain integrity when exposed to moisture and other environmental factors.

Specifications

• New Production: Non-corrosive, boxer-primed
• Reloadable: Nickel-plated brass cases
• Lead-Free: Solid copper construction
• Suppressor Safe: Suitable for use with sound suppressors
• Supersonic: Travels faster than the speed of sound
• Packaging: 20 rounds per box, 10 boxes per case

Application

The Xtreme Defender is engineered for both hunting and self-defense applications where reliable penetration and maximum stopping effectiveness are paramount. The combination of solid construction, optimized velocity, and superior wound characteristics makes this round a serious choice for defensive carry.