Underwood Ammo Xtreme Penetrator 357 Mag 140gr Solid Monolithic - Box or Case

Underwood Ammo Xtreme Penetrator in .357 Magnum is a premium hunting and self-defense load built around a heavy-for-caliber 140 grain solid copper monolithic bullet engineered for deep, straight-line penetration.

The Xtreme Penetrator uses a unique nose profile with cutting edges, paired with a blunt meplat for initial energy transfer and straight, deep penetration. Solid copper construction promotes reliable feeding from revolver cylinders and clean, consistent performance across a wide velocity window. With a muzzle velocity of 1550 fps and 747 ft lbs of muzzle energy, this supersonic load delivers the kind of terminal performance that makes it well suited to medium-to-large game hunting and defensive applications alike.

Underwood loads this ammunition in nickel-plated brass cases for smooth feeding, reliable extraction, and corrosion resistance. Each box contains 20 rounds, and a full case ships with 10 boxes (200 rounds total).

Your purchase options:

• Box - 20 Rounds
• Case - 200 Rounds (10 Boxes)