Underwood Ammo 10mm 155gr XTP JHP - 20 Round Box Premium Defense

The Underwood Ammo 232 XTP delivers maximum stopping power with 155-grain Hornady XTP jacketed hollow point bullets engineered for controlled expansion and deep penetration. This premium 10mm ammunition combines Underwood's hot-loaded powder charges with proven XTP bullet technology for superior terminal performance.

What Makes This Different

Underwood loads their 10mm cartridges to full power specifications, generating velocities that exceed standard factory ammunition by 200-300 fps. The Hornady XTP bullet features precise serrations and a swaged lead core that ensures consistent expansion across velocity ranges from 800 to 1600 fps. This combination delivers energy transfer and wound channel characteristics that surpass conventional hollow points.

Key Features

• 155-grain Hornady XTP jacketed hollow point bullets with controlled expansion design
• Flash-suppressed powder for reduced muzzle signature in low-light conditions
• Nickel-plated brass cases resist corrosion and enhance feeding reliability
• Muzzle velocity of 1400 fps generating 673 ft-lbs of energy
• Consistent powder charges tested for velocity variation under 15 fps
• Compatible with all 10mm Auto firearms including Glock, Springfield, and 1911 platforms
• Premium small pistol primers for reliable ignition in all weather conditions

Field testing demonstrates reliable expansion at distances from 5 to 50 yards with retained bullet weights averaging 95% of original mass. The XTP design penetrates 12-16 inches in ballistic gelatin while maintaining structural integrity through heavy clothing and intermediate barriers. Law enforcement agencies specify this load for duty use due to its consistent terminal ballistics and reduced over-penetration risk compared to full metal jacket rounds.

Technical Specs

• Caliber: 10mm Auto
• Bullet Weight: 155 grains
• Bullet Type: Hornady XTP Jacketed Hollow Point
• Muzzle Velocity: 1400 fps
• Muzzle Energy: 673 ft-lbs
• Case Material: Nickel-plated brass
• Primer: Small pistol, non-corrosive
• Quantity: 20 rounds per box
• Manufactured: USA

This ammunition meets SAAMI specifications while delivering enhanced performance for serious applications. The combination of Underwood's precise loading standards and Hornady's proven XTP technology creates a cartridge that performs when accuracy and stopping power matter most.