The Underwood Xtreme Defender is a monolithic copper solid 9mm Luger load engineered for personal defense and barrier performance. It ships in nickel-plated, boxer-primed brass cases that are reloadable and designed for reliable feeding. The load is rated supersonic and is listed at a muzzle velocity of 1700 fps with a muzzle energy of 436 ft lbs. Packaging is configured as 20 rounds per box with 10 boxes per case.
Key Specifications
- The caliber is 9mm Luger.
- The bullet type is Copper solid (monolithic).
- The listed muzzle velocity is 1700 fps.
- The listed muzzle energy is 436 ft lbs.
- The case material is Nickel-plated brass.
- Each box contains 20 rounds per box.
- Packaging is 10 boxes per case.
- The cases are boxer-primed and reloadable.
- The primary application is listed as Personal defense.
The Xtreme Defender offers a monolithic copper design and nickel-plated brass cases that simplify handling, storage, and reloading while delivering a supersonic profile suitable for defensive and barrier-resilient use. Its construction supports consistent feeding and cleaning, and the overall package is tailored for shooters who prioritize dependable performance from a purpose-built defensive load.
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