Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
Customer Reviews
Helpful Positive Review Awesome cartridge by Bobby, Verified Owner, December 6, 2023
It turns a border line self defense cartridge into a real option for self defense.It’s a huge improvement. Lower recoil and good accuracy.
2/2 found this helpful
Most Recent Reviews Jammed in my bodyguard 2.0 by Diesel, Verified Owner, June 22, 2025
Bought brand new Smith and Wesson bodyguard 2.0 , shoot fmj all cycled perfect, unfortunately I had few of these rounds getting stuck at the feeding ramp so unfortunately for self defense it's a big no go, I did ballistic testing and these penetrate ...
Read More...
Most Recent Reviews Great Defensive Round by Fred, June 1, 2025
This is a great defensive round that is basically the only 380rd that's supersonic. Feeds and fires with great accuracy in my Ruger Security 380. Thank you Underwood!
Most Recent Reviews Freedom seeds by Uncle toby, Verified Owner, May 9, 2025
They are what they are high speed projectiles. Also used them to tighten screws when I don't have a Philips head on me.
Most Recent Reviews good ballistics by MICAH MCMEEN, Verified Owner, April 25, 2025
In my opinion, if you're going to use it.380 for self-defense, it should be loaded with a bullet design similar to this. I recommend these since the projectile is copper. Some of the other prands have a polymer projectile that can fragment. My only ...
Read More...
Most Recent Reviews .380 underwood by Corey Robbins, Verified Owner, January 19, 2025
Order them for beretta 84bb and my wife’s Walther pd380. Love them need to order some 9mm
Read All 10 Reviews
Number of Rounds: 20

Code: 40U-LAP-A63845-638

MPN: 638

UPC: 816874020040

List: $28.50Save $1.61
$1.34/Round
$26.89

Please note: For safety reasons, OpticsPlanet is not able to accept returns of ammunition for any reason, and no refunds will be issued for any returned ammunition.

Product Info for Underwood Ammo Xtreme Defender .380 ACP 68 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammunition

image

The Xtreme Defender is based on the Xtreme Defense Fluid Transfer Monolithic (FTM) family of projectiles. The EXD projectile has optimized flute geometry, total weight, and velocity to achieve a penetration depth up to 18 inches with a permanent wound cavity (PWC) that is just simply enormous; no expanding hollowpoint comes close to achieving anywhere near this collective volume of wound cavity. The non-expanding solid copper body ensures that common materials such as wallboard, sheet metal, and automotive glass will not affect the Permanent Wound Channel or capabilities of the projectile, unlike traditional hollowpoints. As with all of Underwood Ammo rounds, we utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light. While taking advantage of our state of the art testing equipment, this high-performance ammunition is field tested using popular, real firearms that our customers are most likely to own out in the real world with all the elements you would experience. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.

Specifications for Underwood Ammo Xtreme Defender .380 ACP 68 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammunition:

Manufacturer: Underwood Ammo
Caliber: .380 ACP
Number of Rounds: 20
Bullet Type: Monolithic
Bullet Weight: 68 grain
Cartridge Case Material: Nickel Plated Brass
Muzzle Velocity: 1300 ft/s
Muzzle Energy: 255 ft-lbs
Application: Target, Self-defense
Package Type: Box
Included Accessories: None
Primer Style: Centerfire
Lead Free: Yes
Dimensions: 1.20 X 2.45 X 2.80 in
Height: 1.2 in

Features of Underwood Ammo Xtreme Defender .380 ACP 68 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammunition:

  • Flutes that force fluid inward to build hydraulic energy and expel it radially.
  • Consistent penetration and wounding performance despite encountering barriers via monolithic material and non-expanding design.
  • Lightweight - high energy, low recoil
  • It does not rely on deformation for resistance in soft tissue, thus eliminating concerns of over-penetration resulting from a lack of expansion.
  • Barrier Blind - minimal surface area to increase the force at the point of contact and sharp cutting edges that defeat barriers
  • Lead-Free
  • Streamlined manufacturing process over original CNC design.

Package Contents:

  • Underwood Ammo Xtreme Defender .380 ACP 68 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammunition

Underwood Ammo Xtreme Defender .380 ACP 68 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammunition Orderable Models

List of Orderable Models

Underwood Ammo Xtreme Defender .380 ACP 68 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 638 , MPN: 638 , UPC: 816874020040 , Code: 40U-LAP-A63845-638
Compare (0)