Underwood Ammo Ua 815 9Mm 90Gr Xtreme Defender 20/10
$26.06
The Underwood Ammo UA 815 9mm 90gr Xtreme Defender is a compact, lead-free hollow-point round engineered for personal defense and hunting applications. Built on nickel-plated brass cases that are boxer-primed and reloadable, this ammunition delivers a 90-grain copper bullet at 1400 feet per second—fast enough to stay supersonic throughout its flight path. With 392 foot-pounds of muzzle energy, the Xtreme Defender is designed to expand reliably on soft targets while maintaining penetration and control. The low sectional density (0.102) and ballistic coefficient (G1 0.087) reflect its bullet geometry, optimized for terminal performance rather than extended range shooting.
This is ammunition for serious carry or home-defense use. The lead-free construction makes it legal where lead rounds face restrictions, and the round has been tested and proven safe in suppressed firearms, so it works well with threaded barrels and modern sound-reduction systems. New production quality control and non-corrosive primers mean reliable ignition and brass that won't degrade in your dies if you reload. Each box contains 20 rounds, giving you two boxes of ten for convenient counting and carry.
Underwood Ammo's reputation rests on attention to detail and performance testing in the real world. The Xtreme Defender line represents that ethos: a no-nonsense self-defense load for shooters who understand that ammunition is not the place to cut corners. Whether you're loading a carry gun or stocking a nightstand, this 9mm round delivers the velocity, expansion, and reliability that matter when it counts.
Key Features
- Lead-free, copper hollow-point design for safer handling and legal compliance
- Nickel-plated brass cases—reloadable and corrosion-resistant
- 1400 fps muzzle velocity delivers 392 ft-lbs of energy at the muzzle
- Supersonic performance maintains velocity consistency across distance
- Suppressor-safe design for use with threaded barrels and sound reducers
- New production, non-corrosive boxer primers for reliable ignition
- 20 rounds per box (packaged as two boxes of ten)
Specifications
| Caliber | 9mm Luger |
| Bullet Weight | 90 grains |
| Bullet Diameter | 0.355" |
| Bullet Material | Copper (lead-free) |
| Case Type | Nickel-plated brass |
| Primer Type | Boxer (non-corrosive, reloadable) |
| Muzzle Velocity | 1400 feet per second |
| Muzzle Energy | 392 foot-pounds |
| Ballistic Coefficient (G1) | 0.087 |
| Sectional Density | 0.102 |
| Rounds per Box | 20 |
| Suppressor Safe | Yes |
Frequently Asked Questions
Can I use this ammo in a suppressor or with a threaded barrel?
Yes. The Xtreme Defender is rated safe for suppressed firearms, making it a good choice for quiet shooting setups.
Are these cases reloadable?
Yes. The nickel-plated brass cases are boxer-primed and non-corrosive, so they're fully suitable for reloading once fired.
Is this ammunition lead-free?
Yes. The bullet is made entirely from copper, with no lead core. This makes it legal in areas with lead ammunition restrictions and safer for indoor range use.
How many rounds come in a box?
Each box contains 20 loaded rounds, packaged as two boxes of ten.
