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Brownells 75th Anniversary - A Shooting Heritage

Solid Copper Body Packs a Punch

Underwood Ammo’s Xtreme Defender .380 ACP +P Xtreme Defense is unstoppable, leaving your target dead in its tracks with a permanent wound cavity that is over 100% larger than other expanding bullets.

For optimal performance the Underwood Xtreme Defense ammo was CNC machined from solid copper which means this ammunition will hold true to form even if it is shot through barriers.

  • Minimal surface area, increasing the force at point of contact
  • Penetration up to 18 inches
  • Muzzle velocity: 1300 fps
  • 20 rounds per box

The Underwood Ammo Xtreme Defense utilizes radial flutes that force the hydraulic energy inward building pressure to pack a punch your target won’t walk away from.

You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition. All ammunition must be shipped Domestic Ground. Shipping not available for International residents. Residents in CA, DC, IL, MA, NY, CT, and NJ may have additional restrictions. Always make sure you use the correct ammunition for your firearms. Check your state and local laws for any other applicable firearms and ammunition regulations. Due to Department of Transportation regulations, we cannot accept returns on ammo. Please check local laws before ordering. View full restrictions here.

Ammunition pricing is per box.

ATTENTION – California Customers
Brownells is still shipping ammunition orders to California but the process has changed to comply with California Proposition 63. We must now ship ammunition purchased online to an FFL or California-approved ammunition dealer. After placing your order, a Brownells representative will contact you to ensure your ammunition arrives quickly and in compliance with the law.


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