Underwood Ammunition 40 Super 140 Grain Lehigh Xtreme Penetrator Lead-Free Box of 20

Underwood Ammunition 40 Super 140 Grain Lehigh Xtreme Penetrator Lead-Free Box of 20 uses a solid-copper, non-expanding penetrator bullet built for barrier punch without losing wound-channel size. The fluted nose displaces tissue outward as it travels. This keeps performance consistent through denim, drywall, or auto glass. Underwood drives the 40 Super to velocities well beyond most handgun cartridges, and this 140 grain bullet uses that pressure fully.

Solid-Copper Barrier Penetration

As a result, shooters who own a 40 Super pistol and want maximum penetration often reach for this loading first. The lead-free build also avoids the fouling and toxicity concerns tied to traditional lead-core hollow points. Meanwhile, Underwood loads each cartridge to use the 40 Super case fully, which holds more powder than a standard 10mm.

About This Underwood Ammunition 40 Super 140 Grain Lehigh Xtreme Penetrator Lead-Free Box of 20 Load

Underwood remains one of the few manufacturers still producing ammunition for this rare, high-pressure wildcat cartridge. For reference, the 40 Super started as a 10mm case blown out to a wider body. That lets it run at notably higher pressure. Consequently, this cartridge suits shooters who specifically want more velocity than 10mm Auto delivers from a similar-size pistol.

Liberty Anno Supply carries a full lineup of hard-to-find specialty handgun ammunition, ready to ship quickly. All loads follow SAAMI pressure and dimensional standards for safe, reliable function. Browse our full 40 Super ammo selection or check current bulk ammo savings for extra value on larger orders.