top of page

380 ACP 68gr. Xtreme Defender Solid Monolithic Hunting & Self Defense Ammo



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.

*Falling within FBI guidelines

This round offers:
? 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.

Nickel-plated brass casings, our nickel plating process provides several key benefits, not limited to but including; improved feeding in all actions of firearms enhanced corrosion resistance over traditional brass, improved cosmetics, and ease of cleanup during reloading. Nickel-plated casings will not tarnish like brass during storage or when in contact with foreign materials such as leather, moisture, and other metals.

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.

    This ammo is for cartridge size .380 ACP.
    The bullet is made from Copper.
    The diameter (caliber) of this bullet is 0.355.
    This bullet weighs 68 grains.
    This bullet leaves the barrel at 1300 feet per second.
    The ammo case is made from Nickel Plated Brass.
    This ammo is a proven round for hunting.
    The bullet in this product does NOT contain lead.
    This round is designed to be supersonic and travels faster than the speed of sound.
    The muzzle energy of this ammo is 255 ft lbs.
    This product has been designed to be an effective choice for the ultimate in self-defense applications.
    The bullet in this product has a Sectional Density, (SD) of 0.0770822115793352. SD is the ratio of an object's mass to its cross sectional area with respect to a given axis. It conveys how well an object's mass is distributed (by its shape) to overcome resistance along that axis.
    This ammo IS SAFE to use in a suppressor.
    The bullet in this ammo has a ballistic coefficient (G1) of 0.087 - Generally, the higher the coefficient, the more stable the projectile
will be in flight.
    Each box of ammo contains 20 loaded pieces of ammunition.
    This ammo is manufactured by Underwood Ammo




SKU:638
Ballistic Coefficient G1:0.09
Box Of:20
Bullet Construction:Solid Monolithic
Bullet Material:Copper
Bullet Model:Xtreme Defense®
Bullet Weight(gr):68
Cartridge:.380 ACP
Case Type:Nickel Plated Brass
Gun Type:Handgun
Hunting:Personal Defense
Lead Free:Yes
Muzzle Energy (ft. lbs):255
Muzzle Velocity (fps):1300
Sectional Density:0.08
Supressor Safe:Yes
Velocity Rating:Supersonic

Underwood 380acp 65gr Xtreme Defender 20rds 638

SKU: Underwood 638
$29.95Price
Quantity

    PLEASE CHECK THIS WEBSITE THOROUGHLY BEFORE CONTACTING US. ALL OUR UPDATED INVENTORY IS ON THIS WEBSITE INCLUDING FIREARMS, AMMO, AND ACCESSORIES. YOU SHOULD NOT NEED TO ASK WHAT WE HAVE IN STOCK OR IF WE HAVE SOMETHING IN STOCK. WE PUT LONG HOURS INTO THIS WEBSITE TO KEEP IT UP TO DATE. YES SOMETIMES THERE IS A MISTAKE.

    Allsport Performance Inc Maine Gun Dealer Logo
    No Checks Accepted Allsport Performance Maine Gun Dealer
    Payments Accepted Allsport Performance Maine Gun Dealer Hermon
    Cash Discount on all firearms Maine Gun Dealer

    Text Only: 207-848-4995

    Text Only: 207-814-8979

    Phone : Sorry the best way to reach us is via TEXT , EMAIL, (Quick Responses During Business Hours Only) or Just Walk In. Do not use text for FFL Transfers use E-Mail only.

    HOURS: (30min before close for firearms transactions)

    Monday: Noon-5pm

    Tues, Wed, Thurs, & Fri: 9am-5pm.

    Saturday: See Google or Hours Page

    Sunday: Closed

    See the hours page or Google for updated business hours as they may change. Selling a gun collection? See us about an appointment if hours do not work. See the Buy-Sell-Trade page and Appointments Page

    ©2025 Allsport Performance / Maine Gun Dealer all rights reserved

    Built and maintained by website developer and owner Fred Emerson III. Designated trademarks and brands are the property of their respective owners. Use of the content on this website, without written permission, is prohibited.

    bottom of page