$25.99
122 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
The Underwood Xtreme Defender stands apart from traditional hollow point ammunition through its monolithic copper construction and fluid transfer technology. Instead of expanding on impact like conventional defensive rounds, this 90-grain projectile creates a wound cavity through hydraulic displacement. The fluted nose geometry channels tissue and fluid outward at high pressure as the bullet travels through soft tissue, producing a distinctive temporary and permanent wound channel without mechanical expansion.
Machined from solid copper rather than jacketed lead, this round maintains 100% weight retention through most barriers without deforming. The nickel-plated brass cases provide improved feeding reliability and enhanced corrosion resistance compared to standard brass, making them easier to track and reload. The ammunition ships with flash-suppressed powder that minimizes muzzle flash, a thoughtful design choice for low-light defensive scenarios.
Loaded to +P+ pressures, the Xtreme Defender exits the barrel at approximately 1550 fps and delivers around 480 ft-lbs of muzzle energy. Published data indicates penetration reaching up to 18 inches in ballistic gelatin, well within the FBI-recommended range for accessing vital organs from any shooting angle. The 90-grain weight keeps recoil impulse manageable compared to heavier defensive loads, allowing faster sight realignment for follow-up shots.
These are purpose-built rounds for people who want something different from the hollow point norm. The solid copper bullet works effectively through intermediate barriers like automotive glass and heavy clothing without losing its trajectory or performance characteristics. Each box contains 20 rounds of new production, boxer-primed ammunition housed in reloadable cases. Field testing with real firearms ensures the ammunition performs consistently across the handguns people actually carry.
The +P+ designation means this ammunition generates higher pressure than standard or even standard +P loads, so your firearm needs to be specifically rated for +P+ ammunition. Many modern 9mm pistols handle +P+ well, but older designs or compact models may not be suitable. Underwood specifically notes that aftermarket Sig P365 conversion barrels are not recommended for their +P and +P+ 9mm ammunition. Check your firearm's manual or contact the manufacturer if you're unsure.
The Xtreme Defender doesn't expand like a hollow point. Instead, the machined flutes on the nose create hydraulic displacement as the bullet travels through soft tissue, pushing fluid and tissue outward to form a large wound cavity. This design works through barriers like glass and heavy clothing without deforming, staying barrier-blind where hollow points might deform or fail to expand after passing through obstacles.
Yes, the nickel-plated brass cases are boxer-primed and new production, making them suitable for reloading. The nickel plating provides better corrosion resistance during storage and handling compared to standard brass, and the cases cycle smoothly through semi-automatic firearms for reliable extraction.
While this is a premium self-defense cartridge designed specifically for serious applications, some people do use lighter quantities at the range to familiarize themselves with how their carry gun behaves with the actual defensive load they'll carry. Most shooters reserve this ammunition for defense or duty use rather than range practice due to cost, preferring to train with standard pressure 9mm practice loads.
| Caliber/Gauge | 9mm |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 1.30 |
| Grains | 90 gr |
| Length | 2.6500 |
| Manufacturer | |
| Manufacturer Part Number | 817 |
| Shipping Weight | 0.5 |
| Units per Box | 20 |
| UPC | 816874020149 |
You must be logged in to post a review.
Reviews
There are no reviews yet.