The Underwood Ammo Xtreme Defender is a 10mm Auto cartridge loaded with a 115-grain solid copper monolithic bullet. This is new-production, non-corrosive ammunition loaded in nickel-plated, boxer-primed brass cases and listed at 1700 feet per second with 738 ft·lbs of muzzle energy. Each boxed unit contains 20 cartridges and boxes are packed 10 per case. The monolithic copper construction is specified to maintain mass and penetration through common barriers and is presented for hunting and personal defense applications.
Key Specifications
- Caliber: 10mm Auto.
- Bullet weight: 115 grains.
- Bullet type: Copper solid (monolithic).
- Muzzle velocity: 1700 fps (listed).
- Muzzle energy: 738 ft·lbs (listed).
- Cartridges per box: 20 rounds.
- Boxes per case: 10 boxes.
- Case material: Nickel-plated brass.
- Reloadable: Yes (boxed in boxer-primed brass).
- Application: Personal defense, hunting.
Designed for shooters who value durable, barrier-resistant performance, this load combines a monolithic copper design with consistent listed velocity and nickel-plated brass for improved feeding and corrosion resistance. Its reloadable casework and 20-round packaging make it practical for range use and field applications where dependable, maintainable ammunition is required.
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