Underwood 9mm Luger +P 68gr Xtreme Defender
Underwood's Xtreme Defender 9mm +P load features a solid copper bullet with optimized fluting designed to create a permanent wound cavity twice the size of conventional expanding rounds while maintaining barrier-defeating performance.
Underwood Xtreme Defender 9mm Luger +P
The Xtreme Defender represents a significant advancement in defensive ammunition design. Built on proven engineering principles, this 68-grain solid copper round delivers performance characteristics that set it apart from conventional hollow-point designs.
Ballistic Performance
- Velocity: 1800 feet per second
- Penetration: Achieves 18 inches of penetration depth
- Wound Cavity: Permanent wound cavity 2x larger than expanding hollow-point bullets
- Expansion: Maintains expansion even after passing through barriers
Design Features
The Xtreme Defender employs a solid copper construction with optimized nose fluting that channels hydraulic energy inward, building pressure for consistent performance. The radial flutes force energy to work vertically rather than expanding laterally, creating a narrow profile with sharp cutting edges that defeat intermediate barriers—wallboard, sheet metal, and automotive glass have no effect on the permanent wound channel.
This design philosophy means you get barrier-defeating capability without sacrificing the wound channel characteristics that matter in defensive situations.
Ammunition Specifications
- Casing: Nickel-plated brass for superior corrosion resistance and reliable feeding across all firearm actions
- Powder: Flash-suppressed formula to preserve vision in low-light defensive scenarios
- Package: 20 rounds per box, 10 boxes per case
Nickel-plating provides measurable advantages over traditional brass: improved feeding reliability, enhanced corrosion resistance, superior cosmetics, and easier cleanup during reloading. The nickel coating prevents tarnishing during storage and resists degradation from contact with leather, moisture, and other metals.
