The Underwood Ammo 836 Xtreme Penetrator 357 Mag 140gr Solid Monolithic round is engineered for shooters who demand consistent performance from their handgun ammunition. Built around Lehigh Defense’s Xtreme Penetrator solid copper bullet, this load is designed to maximize straight-line penetration while maintaining reliable feeding in a wide range of .357 Magnum firearms.

This cartridge uses a nickel-plated brass case, flash-suppressed powder, and a lead-free solid monolithic copper projectile, making it suitable for hunting and dedicated personal protection roles where deep penetration and barrier performance are important. With supersonic muzzle velocity and carefully tuned components, it is well suited for range work, training, and field use on medium to large game. Underwood Ammo’s focus on precision manufacturing and quality control helps ensure each round delivers repeatable ballistics and dependable function.

Key Features:

• Manufacturer: Underwood Ammo
• Model: 836 Xtreme Penetrator 357 Mag 140gr
• Caliber: .357 Magnum
• Bullet Weight: 140 Grains
• Bullet Type: Solid Monolithic Xtreme Penetrator Copper
• Case Type: Nickel-Plated Brass
• Lead Free: Yes
• Muzzle Velocity: 1550 Fps
• Muzzle Energy: 747 Ft Lbs
• Units Per Box: 20