9MM

9MM Luger +P+ – Underwood Ammo 90 Grain Xtreme Defender Solid Monolithic (817) – 20 Round Box

UPC: 816874020149

Underwood Ammo 9mm Luger +P+ 90 Grain Xtreme Defender (817) ammunition is engineered for maximum defensive performance. Featuring a solid copper Xtreme Defender projectile by Lehigh Defense, this load utilizes a fluted design to create fluid displacement and deep penetration without relying on traditional hollow point expansion.

The +P+ pressure rating provides increased velocity and energy beyond standard and +P loads, enhancing terminal effectiveness. The 90 grain projectile offers a balance of speed and mass, while nickel-plated brass cases improve feeding reliability and corrosion resistance in demanding conditions.

Ballistic Data

• Caliber: 9mm Luger +P+

• Bullet Weight: 90 grains

• Bullet Type: Xtreme Defender Solid Monolithic (Fluted Solid Copper)

• Muzzle Velocity: Approximately 1,600 fps

• Muzzle Energy: Approximately 512 ft-lbs

Technical Specifications

• Manufacturer: Underwood Ammunition

• Bullet Manufacturer: Lehigh Defense

• Part Number: 817

• Case Type: Nickel-Plated Brass

• Primer: Boxer, non-corrosive

• Reloadable: Yes

• Rounds Per Box: 20

• UPC: 816874020149

Usage

• Personal defense

• Concealed carry (in +P/+P+ rated firearms only)

• Home defense

Performance Characteristics

• Fluted Solid Design: Creates wound channels through fluid displacement rather than expansion.

• +P+ High Velocity Load: Increased speed and energy for maximum effectiveness.

• Barrier Performance: Maintains effectiveness through common obstacles.

• Nickel-Plated Cases: Improve feeding reliability and corrosion resistance.

• Premium Components: Manufactured to Underwood’s high-performance standards.

Summary

Underwood 9mm Luger +P+ 90 Grain Xtreme Defender (817) delivers extremely high velocity, deep penetration, and innovative terminal performance in a 20-round box. Designed for defensive use, it offers reliable function and enhanced effectiveness when used in properly rated firearms.