Underwood Ammo Ua 816 9Mm +P 90Gr Xtreme Defender 20/10
$26.06
The Underwood Ammo 9mm +P 90gr Xtreme Defender is a modern, purpose-built self-defense round engineered for shooters who want a reliable, hard-hitting option in a compact, lightweight package. Built on nickel-plated brass cases with non-corrosive boxer primers, this ammunition delivers 1475 feet per second and 435 ft-lbs of muzzle energy—velocities and power that put this round in the supersonic realm, ensuring consistent performance across a wide range of 9mm platforms. The 90-grain Xtreme Defender bullet is lead-free, all-copper construction, designed to provide the penetration and expansion characteristics serious defensive shooters expect.
This is ammunition built for real-world carry and personal protection. The copper-core bullet design and sectional density of 0.102 offer a balance of velocity and mass retention that translates to reliable performance on target. Whether you're looking for a duty round, a carry load, or ammunition for defensive pistol training, the Xtreme Defender's speed and energy make it a solid choice. The ballistic coefficient of 0.087 (G1) keeps the projectile stable in flight, which matters when precision and consistency are non-negotiable.
Reloadable brass cases mean you can reload these cartridges after firing, which appeals to shooters looking to get more life from their spent casings. And if you run a suppressed 9mm, you're in luck—this round is confirmed safe for suppressor use, giving you flexibility whether you're shooting unsuppressed or with a can attached.
Each box contains 20 loaded rounds, making the 20/10 pack configuration easy to stock and manage. Underwood's reputation for quality control and consistent powder charges means you can trust these loads to perform the same way, shot after shot.
Key Features
- Lead-free, all-copper bullet construction for clean shooting and environmental responsibility
- Nickel-plated brass cases for corrosion resistance and consistent case life
- Non-corrosive boxer primers for easy reloading
- Supersonic velocity (1475 fps) designed for reliable expansion and penetration
- Safe for use in suppressed firearms
- Reloadable brass casings
Specifications
| Caliber | 9mm Luger +P |
| Bullet Weight | 90 grains |
| Bullet Material | Copper |
| Bullet Diameter | 0.355" |
| Muzzle Velocity | 1475 fps |
| Muzzle Energy | 435 ft-lbs |
| Ballistic Coefficient (G1) | 0.087 |
| Sectional Density | 0.102 |
| Case Type | Nickel-Plated Brass |
| Primer Type | Boxer, Non-Corrosive |
| Reloadable | Yes |
| Lead Content | Lead-Free |
| Rounds Per Box | 20 |
| Manufacturer | Underwood Ammo |
Frequently Asked Questions
Can I use this 9mm +P ammunition in a standard 9mm gun?
The Xtreme Defender is loaded to +P pressure levels. While many modern 9mm firearms are rated for +P ammunition, always consult your firearm's manual or manufacturer to confirm your specific model is approved for +P loads. Using +P ammunition in firearms not rated for it can cause damage and safety issues.
Is this ammunition suppressor-safe?
Yes. The Underwood 9mm +P 90gr Xtreme Defender is confirmed safe for use in suppressed firearms, giving you flexibility whether you're shooting with or without a can.
Can I reload these cartridges?
Yes. These rounds use non-corrosive boxer-primed brass cases that are reloadable, so you can reload and reuse the casings after firing.
What is this ammunition designed for?
The Xtreme Defender is engineered as a self-defense and duty round. The all-copper, lead-free bullet design and supersonic velocity are intended to deliver reliable expansion and penetration for personal protection applications.
