Underwood Ammo Xtreme Penetrator (Platinum Edition) Handgun Ammunition 10mm Auto 140gr Solid 700 fps 20/ct

The Underwood Ammo Xtreme Penetrator (Platinum Edition) 10mm Auto handgun ammunition is purpose-built for shooters who demand serious penetration and velocity in a compact, powerful cartridge. Loaded with a 140-grain solid copper bullet that leaves the muzzle at 700 feet per second, this round delivers the kind of performance that appeals to hunters, self-defense-minded shooters, and competitive handgun users who understand the 10mm's reputation for stopping power and deep, consistent penetration.

What sets the Xtreme Penetrator apart is its design philosophy: maximum velocity and penetration without the hassle of lead-core bullets. The solid copper construction ensures reliable expansion and energy transfer while maintaining the sectional density needed to push through barriers and heavy clothing. At 700 fps muzzle energy, this ammunition is engineered to be supersonic—fast enough to reduce subsonic considerations and deliver terminal performance when it counts. The nickel-plated brass cases are non-corrosive, boxer-primed, and fully reloadable, so once you run through a box, the brass has value for handloaders.

If you run a suppressor on your 10mm, this round is safe to use with sound-modulation systems. Each box contains 20 loaded rounds, making it convenient to stock up for the range, hunting trips, or dedicated self-defense use. Underwood's attention to quality manufacturing and consistent loading practices means you get ammunition you can trust when performance matters most.

Key Features

• 140-grain solid copper bullet—lead-free construction for cleaner shooting and handling
• 700 fps muzzle velocity and energy—supersonic performance for reliable ballistics
• Nickel-plated brass cases—corrosion-resistant, reloadable, and durable
• Suppressor-safe—compatible with sound suppressors for quiet-shooting setups
• Non-corrosive, boxer-primed—easy reload capability for handloaders
• 20 rounds per box—convenient count for range sessions and field use

Specifications

Frequently Asked Questions

Is this 10mm ammo good for hunting?

Yes. The Xtreme Penetrator is designed as a proven hunting round, and the 140-grain solid copper bullet with deep sectional density (0.125) is engineered to penetrate consistently. The velocity and energy levels make it suitable for medium-sized game when fired from a capable 10mm handgun or carbine.

Can I use this ammo with a suppressor?

Yes, this ammunition is safe to use in a suppressor. The round is supersonic, so you'll hear the crack of the bullet even with a suppressor installed—but the can is fully compatible with the load.

Are the brass cases reloadable?

Yes. The cases are nickel-plated brass, non-corrosive, and boxer-primed, making them suitable for reloading once you've fired them. This extends the value of each round, especially useful for handloaders who shoot 10mm regularly.

What's included in a box?

Each box contains 20 loaded rounds of Underwood Ammo Xtreme Penetrator 10mm Auto ammunition, ready to load and shoot.