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This is a different breed of defensive ammunition. The Underwood Xtreme Defender uses a solid copper bullet built with radial flutes machined into the tip, which creates terminal performance through a completely different mechanism than traditional hollow points. As the bullet travels through its target, the flutes force hydraulic energy outward, generating a massive permanent wound cavity without any expansion.
The 90-grain solid copper projectile leaves the muzzle at 1400 feet per second and generates 392 foot-pounds of energy. The fluted design and optimized nose geometry allow the round to penetrate deeply and consistently, achieving up to 18 inches of penetration in testing while creating a permanent wound cavity that exceeds what traditional hollow points deliver. The solid copper construction means barriers like heavy clothing, drywall, or vehicle glass don't affect the round's performance the way they typically would with conventional defensive ammunition.
Underwood chambers these rounds with Ducta-Bright 7a nickel-plated brass, which resists tarnishing and feeds smoothly through semi-automatic pistols. The nickel plating also won't embrittle like traditional nickel plating can under pressure. All rounds use boxer primers and are fully reloadable, giving you flexibility if you reload. The powder is flash-suppressed, so your night vision won't take a hit if you need to use this ammunition in low-light situations.
These are field-tested rounds that Underwood validates using the actual firearms their customers carry, not controlled lab setups. Each box contains 20 rounds of new production, non-corrosive ammunition that will cycle reliably in any standard 9mm semi-automatic pistol.
No, it's a solid copper bullet without a nose cavity. The round doesn't expand on impact like traditional hollow points. Instead, it uses machined flutes that create a massive wound cavity through fluid dynamics as the bullet travels through tissue. The solid design makes it more reliable through barriers like heavy clothing, drywall, and automotive glass.
Yes. The fluted bullet profile is narrower and more similar to full metal jacket ammunition than traditional hollow points, which helps it feed smoothly. The nickel-plated brass casings are specifically designed for reliable feeding in semi-automatic actions. Underwood field tests these rounds in the actual popular pistols customers own.
Yes, the nickel-plated brass casings are boxer-primed and fully reloadable. Underwood uses a Ducta-Bright 7a nickel plating process that's less brittle than traditional nickel plating, so the cases can withstand multiple reloads without cracking or embrittling.
The flash-suppressed powder doesn't compromise accuracy or performance. It reduces muzzle flash in low-light situations so your vision isn't compromised if you need to use the firearm defensively in the dark. The round delivers the same velocity and energy as standard powders while giving you that tactical advantage.
| UPC | 816874020125 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 815 |
| Caliber/Gauge | 9mm |
| Case Material | Nickel-Plated Brass |
| Grains | 90 gr |
| Length | 2.6500 |
| Shipping Weight | 0.5 |
| Units per Box | 20 |
| Cost per Round | 1.45 |
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