Underwood 357 Magnum 158gr XTP Jacketed Hollow Point

Underwood 357 Magnum 158gr XTP Performance Ammunition

Underwood Ammo has engineered this 357 Magnum load around Hornady's renowned eXtreme Terminal Performance (XTP) bullet—a projectile that has earned its reputation through decades of real-world performance in the field and in defensive situations.

Bullet Performance

The XTP bullet is designed with a single purpose: controlled, predictable expansion combined with deep penetration. The 158-grain weight at 1500 feet per second delivers 790 foot-pounds of muzzle energy—sufficient for hunting medium game and effective for self-defense applications. The bullet's sectional density of 0.177 and ballistic coefficient of 0.206 ensure stable flight and consistent performance downrange.

Case Construction

Underwood uses nickel-plated brass cases rather than conventional brass. This choice offers several practical advantages:

• Corrosion resistance: Nickel plating resists tarnishing from moisture, leather contact, and storage conditions
• Improved feeding: Enhanced reliability across all firearm actions
• Easier cleanup: Reloaders appreciate the cosmetic benefits and reduced oxidation
• Durability: Cases maintain their appearance and integrity longer than traditional brass

Powder and Primers

This ammunition employs flash-suppressed powder—a critical feature if you ever need to use your firearm in low-light conditions. The flash reduction preserves your night vision and situational awareness. All rounds are boxer-primed in non-corrosive formulation, making them suitable for reloading.

Practical Considerations

Underwood field-tests every load in real firearms that shooters actually own, under real-world conditions. This 357 Magnum round is suppressor-safe and loaded to supersonic velocities, ensuring reliable function in modern defensive and hunting platforms.

Box Contents: 20 rounds per box