Brownells 75th Anniversary - A Shooting Heritage
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Xtreme Name for Extreme Performance

Underwood Ammo is known for their power and precision, and they’ve joined forces with Lehigh Defense to produce the Xtreme Penetrator line of ammunition. Lehigh’s Xtreme Penetrator is a solid copper bullet featuring a specially designed nose to maximize penetration into the target, while also feeding reliably from a magazine.

The Underwood Ammo Xtreme Penetrator round hits the target hard, the unique nose increasing the hydraulic velocity inside, resulting in a massive permanent wound cavity surpassing the performance of the competition.

  • Bullet weight: 140 grains
  • Muzzle velocity: 1,500 fps
  • Muzzle energy: 700 ft/lbs
  • 20 rounds per box

Computer designed and CNC machined, the Underwood Ammo Xtreme Penetrator is great for the environment, but real bad for your target.

Ammo
WARNING
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.

UNDERWOOD AMMO - UNDERWOOD AMMO 10MM AUTO 140GR XTREME PENETRATOR

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