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The Underwood 380 ACP +P Xtreme Penetrator load brings serious penetration capability to a compact cartridge. Built on Lehigh Defense's proven bullet design, this round features a solid copper construction with a uniquely engineered blunt nose that creates a permanent wound channel without expanding. That design choice means barrier performance remains consistent whether rounds encounter wallboard, sheet metal, or other common obstacles.
Each bullet is precision CNC-machined from lead-free copper, making this round environmentally friendly while maintaining the solid construction needed for barrier penetration. The distinctive nose profile works by creating hydraulic energy spikes that generate a larger wound cavity compared to traditional hollow-point designs. With a flat, blunt profile, this round achieves straight-line penetration while feeding reliably from compact pistol magazines. The solid construction also means no jacket separation or deformation when contacting hard surfaces.
This ammunition is loaded to elevated pressures to deliver increased velocity from short barrels, reaching 1200 feet per second with 288 foot-pounds of muzzle energy. Underwood uses flash-suppressed powder throughout their line, so low-light performance stays sharp if your carry pistol ever needs to be used defensively. New production ammunition comes in nickel-plated brass cases, which are non-corrosive, boxer-primed, and reloadable for those who reload.
Each box contains 20 rounds ready to load. The ammunition is field tested in real firearms that customers actually carry, ensuring performance in the conditions that matter. This is purpose-built defensive ammunition designed for maximum penetration in a caliber that demands it.
Because this is a +P load running elevated pressures, your firearm must be specifically rated for +P ammunition. Check your manufacturer's documentation or have a gunsmith verify compatibility before using. Not all .380 ACP firearms are rated for +P pressures, especially older models. Underwood's technical team is also available if you have questions about your specific firearm.
The Xtreme Penetrator uses a solid copper bullet that doesn't expand, instead relying on a uniquely designed nose profile to create a permanent wound channel through hydraulic energy transfer. This design means performance remains consistent when the bullet encounters barriers like clothing, drywall, or sheet metal, where expanding hollow-points may lose effectiveness. The tradeoff is maximum penetration depth rather than expansion diameter.
Yes, the 1200 fps velocity makes this a supersonic load that travels faster than the speed of sound. It is rated as safe for use in a suppressor, though it will not provide the same sound reduction as subsonic ammunition due to the higher velocity.
While shootable for practice, this is a premium, performance-focused defensive load. The +P pressure rating and specialized bullet design make it more expensive per round than standard practice ammunition. Many carriers keep this round loaded for defensive purposes and use less costly ammunition for range training and familiarization.
| Caliber/Gauge | .380 ACP |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 1.90 |
| Grains | 90 gr |
| Length | 2.7000 |
| Manufacturer | |
| Manufacturer Part Number | 641 |
| Units per Box | 20 |
| UPC | 816874021948 |
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