Underwood 9mm Luger +P+ 115gr Xtreme Penetrator ammunition comes 20 rounds to the box (Underwood part no. 823). The bullet is a Lehigh Defense Xtreme Penetrator, a solid copper, lead-free design with a unique nose that Underwood says increases hydraulic velocity and creates a larger permanent wound cavity. Underwood designates the cartridge as 9mm Luger +P+ and publishes 1300 fps at the muzzle. Cases are nickel-plated brass.

Key Specifications

• The cartridge is 9mm Luger +P+, as Underwood designates it.
• The bullet weighs 115 grains, a light weight for a solid.
• The bullet is the Lehigh Defense Xtreme Penetrator solid monolithic, built for deep, straight penetration.
• The bullet is solid copper with no lead, as Underwood lists it.
• Published muzzle velocity is 1300 fps, a supersonic figure.
• Sectional density is 0.13, Underwood’s published measure.
• Cases are nickel-plated brass, which feeds smoothly.
• Underwood lists the load as suppressor safe, for suppressed 9mm pistols.
• Each box holds 20 rounds, a practical count.

Frequently Asked Questions

What is special about the nose? Underwood says the unique nose increases hydraulic velocity, creating pressure spikes and a larger permanent wound cavity, with over twice the penetration of most expanding bullets.

Is there a note on aftermarket barrels? Yes. Underwood states that aftermarket Sig P365 conversion barrels are not recommended for use with its +P and +P+ 9mm ammunition.

Is it lead-free? Yes. Underwood lists the bullet as solid copper with no lead.

Buy the Underwood 9mm Luger +P+ 115gr Xtreme Penetrator

A solid copper bullet at +P+ speed is an unusual 9mm, and this is Underwood’s answer. Order it from our Lubbock, Texas gun shop through Underwood in our handgun ammunition category and it ships fast to your door.