Underwood Ammo 10mm Auto 135gr JHP – 20rd

Underwood Ammo 231 Sporting is a factory-new 10mm Auto load loaded with a 135-grain jacketed hollow point bullet. The manufacturer’s data lists a muzzle velocity of 1600 fps and cases made from nickel-plated brass; the rounds are described as boxer-primed and reloadable. Each shipping box contains 20 rounds, and boxes are packed 10 per case. The cartridge is positioned for hunting and defensive use where a jacketed hollow point is appropriate.

Key Specifications

• Caliber: 10mm Auto.
• Bullet weight: 135 grains.
• Bullet type: Jacketed hollow point (JHP).
• Muzzle velocity: 1600 fps.
• Case material: Nickel-plated brass.
• Rounds per box: 20.
• Boxes per case: 10.
• Reloadable cases: Yes.
• Primer & condition: Boxer-primed, new production, non-corrosive.
• Rating: Supersonic.

This Underwood 10mm offering combines a controlled-expansion hollow point with nickel-plated brass cases for reliable feeding, corrosion resistance, and reloadability. It is a practical choice for experienced shooters seeking a versatile 10mm load for hunting scenarios and defensive applications.