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The Underwood Xtreme Defender 10mm combines serious velocity with solid copper construction designed to handle real-world hunting and defense situations. Built on the proven Xtreme Penetrator platform, this 115-grain round moves downrange at 1700 feet per second, generating 738 foot-pounds of muzzle energy. The lightweight projectile helps manage recoil while maintaining the kinetic energy needed for medium-sized game.
What makes the Xtreme Defender stand out is the engineered nose flute and sharp cutting edges. Instead of relying on traditional bullet expansion, the design creates a permanent wound cavity while maintaining barrier resistance. You get deep penetration alongside consistent performance whether your round passes through barriers like wallboard, sheet metal, or automotive glass. The solid copper construction means no lead concerns, making these rounds suitable for lead-free shooting areas.
The 115-grain weight puts this round in the sweet spot for 10mm shooters looking to balance speed and terminal performance. Flash-suppressed powder preserves your vision in low-light situations, an often-overlooked detail that matters when it counts. Every round is hand-tested using real firearms that customers actually own, not just optimized lab guns.
These come loaded into nickel-plated brass cases with boxer primers, making them reloadable after firing. The nickel plating improves feeding reliability across different action types and resists corrosion better than standard brass. All ammunition is new production and non-corrosive.
Yes. The Xtreme Defender was engineered for both applications. The 115-grain solid copper design prioritizes penetration and wound channel creation while maintaining barrier resistance. For hunting, the velocity and energy work well on medium-sized game. For personal defense, the design creates substantial temporary and permanent wound cavities despite being a monolithic copper bullet rather than a traditional expanding hollow point.
Yes. The 10mm Xtreme Defender uses non-corrosive boxer-primed brass cases that are fully reloadable. The nickel plating actually improves reliability through your reloader compared to traditional brass, resisting corrosion and feeding smoothly through equipment. Just inspect cases for any damage before reloading.
The solid copper construction and optimized nose flute design create sharp cutting edges that defeat barriers without deflection or deformation. Wallboard, sheet metal, and automotive glass have minimal effect on the bullet's performance. The design prioritizes energy distribution inward through fluting rather than relying on expansion to do damage, which helps maintain the wound channel through common obstacles.
At 1700 feet per second, this lightweight bullet achieves high velocity that helps manage recoil while delivering 738 foot-pounds of energy. The velocity is critical to the Xtreme Defender design, as it activates the hydraulic effect created by the nose flute. This generates the wide permanent wound cavity the round is known for, making it one of the hotter factory 10mm loads available.
| Caliber/Gauge | 10mm |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 1.65 |
| Grains | 115 gr |
| Length | 3.1500 |
| Manufacturer | |
| Manufacturer Part Number | 940 |
| Shipping Weight | 0.64 |
| Units per Box | 20 |
| UPC | 816874023782 |
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