Underwood Xtreme Defense Platinum .380 ACP +P 68gr Solid Monolithic

The Underwood Xtreme Defense Platinum .380 ACP +P 68-grain Solid Monolithic (Underwood part no. 679) is built around a solid, machined copper bullet rather than a traditional hollow point. Instead of expanding, its fluted nose design is shaped to drive a wide, permanent wound channel while punching straight through deep, avoiding the risk of clogging and failing to open that a hollow point can face against heavy clothing. At only 68 grains, it’s dramatically lighter than a standard 90-100 grain .380 ACP bullet, which combined with the +P pressure rating pushes velocity well beyond typical .380 loads. Cases are nickel-plated brass, both for smoother feeding and easy visual identification in a carry gun’s magazine.

Key Specifications

• Chambered in .380 ACP +P, a higher-pressure loading of the .380 Auto cartridge.
• The 68-grain bullet is dramatically lighter than a standard 90-100 grain .380 bullet, which lets it reach significantly higher velocity.
• Bullet construction is solid monolithic copper, machined from a single piece rather than built as a jacketed or hollow-point design.
• This bullet does not expand — its fluted nose profile is shaped to cut a wide, permanent wound channel while driving straight through rather than deforming.
• This is Underwood’s Xtreme Defense Platinum line, built for maximum velocity and penetration from a lightweight solid bullet.
• Cases are nickel-plated brass, which feeds smoothly and is easy to identify visually in a carry magazine.
• It ships 20 rounds to a box, standard for this Underwood loading.
• Cost works out to about $1.34 per round, in line with premium boutique defensive ammunition.
• The combination of a light bullet and +P pressure gives this load noticeably higher velocity than a standard-pressure .380 loading.

Frequently Asked Questions

Will this bullet expand? No — it’s a solid monolithic copper bullet designed to penetrate deep via its fluted nose shape rather than expand like a hollow point.

Is this +P ammunition safe in my pistol? Only if your pistol is rated for +P .380 ACP — check your owner’s manual before shooting +P ammunition.

How many rounds come in a box? Each box holds 20 rounds.

Buy the Underwood Xtreme Defense Platinum .380 ACP +P 68gr Solid Monolithic

For a pocket .380 that needs a bullet that won’t clog and fail to open, a solid penetrator sidesteps that risk entirely. Order it from our Underwood Ammo lineup at our Lubbock, Texas gun shop and it ships fast to your door, or browse the full handgun ammunition selection for more compact-carry defense loads.