Underwood Ammo194201729
Underwood Ammo 913Underwood Ammo 913 Xtreme Hunter 357Mag 120gr Solid Monolithic 20 Per Box/10 Case$42.97
Availability: In Stock
Underwood Ammo's 836 Xtreme Penetrator in .357 Magnum pairs precision handloading with Lehigh Defense's solid copper bullet technology. Built on a 140-grain monolithic copper projectile, this round delivers the penetration and barrier-defeating performance serious handgun shooters demand—whether for home defense, duty carry, or field use where deep, reliable penetration matters. Each box contains 20 rounds, with 10-box cases available.
The Xtreme Penetrator's design centers on a purpose-engineered nose geometry that drives penetration without relying on expansion. A solid copper construction eliminates lead, making it cleaner to handle and shoot, and the CNC-machined bullet body features hardened cutting edges designed to push through intermediate barriers—drywall, light barriers, and other obstacles—without deformation or deflection. The blunt nose profile supports reliable feeding in lever-action and semi-automatic platforms while transferring energy early in the wound column.
This is ammunition built for shooters who prioritize deep, straight-line penetration over expansion. The monolithic solid copper construction means no jacket-core separation, no fragmentation, and consistent performance shot to shot. Underwood's handloading pairs consistent brass, proven powders, and quality control with Lehigh's bullet design—a combination that delivers shooters who shoot often appreciate.
| Brand | Underwood Ammo |
| Caliber | .357 Magnum |
| Bullet Weight | 140 grains |
| Bullet Type | Solid Monolithic Copper (Xtreme Penetrator) |
| Quantity per Box | 20 rounds |
| Case Quantity | 10 boxes |
Yes. The blunt nose profile is specifically designed for reliable magazine and chamber feeding in both lever-action and semi-automatic platforms, unlike many solid copper or non-expanding designs.
Monolithic solid copper bullets like the Xtreme Penetrator prioritize deep, straight-line penetration and barrier performance over expansion. There's no jacket-core separation, no fragmentation, and the hardened cutting edges are engineered to defeat intermediate barriers without deflection or deformation.
Yes. The solid copper construction eliminates lead entirely, making it cleaner to handle and shoot.
Underwood Ammo 836 Xtreme Penetrator is packaged 20 rounds per box. Cases contain 10 boxes (200 rounds total).
SKU: 194201723 • Width: 2.2in • Height: 2in • Depth: 2.7in • Weight: 0.7oz
Availability: In Stock
Underwood Ammo's 836 Xtreme Penetrator in .357 Magnum pairs precision handloading with Lehigh Defense's solid copper bullet technology. Built on a 140-grain monolithic copper projectile, this round delivers the penetration and barrier-defeating performance serious handgun shooters demand—whether for home defense, duty carry, or field use where deep, reliable penetration matters. Each box contains 20 rounds, with 10-box cases available.
The Xtreme Penetrator's design centers on a purpose-engineered nose geometry that drives penetration without relying on expansion. A solid copper construction eliminates lead, making it cleaner to handle and shoot, and the CNC-machined bullet body features hardened cutting edges designed to push through intermediate barriers—drywall, light barriers, and other obstacles—without deformation or deflection. The blunt nose profile supports reliable feeding in lever-action and semi-automatic platforms while transferring energy early in the wound column.
This is ammunition built for shooters who prioritize deep, straight-line penetration over expansion. The monolithic solid copper construction means no jacket-core separation, no fragmentation, and consistent performance shot to shot. Underwood's handloading pairs consistent brass, proven powders, and quality control with Lehigh's bullet design—a combination that delivers shooters who shoot often appreciate.
| Brand | Underwood Ammo |
| Caliber | .357 Magnum |
| Bullet Weight | 140 grains |
| Bullet Type | Solid Monolithic Copper (Xtreme Penetrator) |
| Quantity per Box | 20 rounds |
| Case Quantity | 10 boxes |
Yes. The blunt nose profile is specifically designed for reliable magazine and chamber feeding in both lever-action and semi-automatic platforms, unlike many solid copper or non-expanding designs.
Monolithic solid copper bullets like the Xtreme Penetrator prioritize deep, straight-line penetration and barrier performance over expansion. There's no jacket-core separation, no fragmentation, and the hardened cutting edges are engineered to defeat intermediate barriers without deflection or deformation.
Yes. The solid copper construction eliminates lead entirely, making it cleaner to handle and shoot.
Underwood Ammo 836 Xtreme Penetrator is packaged 20 rounds per box. Cases contain 10 boxes (200 rounds total).
SKU: 194201723 • Width: 2.2in • Height: 2in • Depth: 2.7in • Weight: 0.7oz