The Underwood Ammo 817 Xtreme Defender is a 9mm Luger +P+ handgun cartridge loaded with a 90-grain copper solid (monolithic) bullet. This product is offered in nickel-plated brass, boxer-primed cases and is supplied as 20 rounds per box with 10 boxes per case. Published ballistic data lists a muzzle velocity of approximately 1550 feet per second and muzzle energy around 480 ft-lbs. The ammunition is lead-free and described for personal defense and related applications where high-velocity monolithic performance is desired.
Key Specifications
- The caliber is 9mm Luger +P+.
- The bullet weight is 90 grains.
- The bullet construction is copper solid (monolithic).
- The listed muzzle velocity is 1550 fps.
- The listed muzzle energy is 480 ft-lbs.
- The case material is nickel-plated brass.
- Each box contains 20 rounds.
- There are 10 boxes per case.
- The cartridges are specified as reloadable.
- The stated primary application is personal defense.
Designed for shooters who prioritize high-velocity, lead-free monolithic bullets and durable case construction, this cartridge offers consistent feeding, reloadable brass, and published ballistics that support barrier performance and controlled penetration profiles. Its combination of copper solid construction, nickel-plated brass, and +P+ velocity characteristics make the Xtreme Defender a practical option for experienced users seeking a high-performance 9mm option for defensive and related uses.
Related Videos:
Reviews
There are no reviews yet.