Underwood Ammo 10mm 220gr Hard Cast Flat Nose - 20 Round Box

The Underwood Ammo 242 delivers maximum penetration and stopping power with its 220-grain hard cast flat nose design engineered for serious 10mm applications. This premium ammunition combines proven hard cast bullet technology with Underwood's reputation for consistent velocities and reliable performance across all shooting conditions.

What Makes This Different

Hard cast bullets maintain their structural integrity through heavy bone and dense materials where jacketed rounds often fragment or deform. The flat nose profile creates larger wound channels compared to round nose designs while the 220-grain weight provides deep penetration at moderate velocities. Underwood's loading specifications generate approximately 1,200 fps from a 5-inch barrel, delivering over 700 foot-pounds of energy downrange.

Key Features

• 220-grain hard cast lead bullet for maximum penetration
• Flat nose design creates wider wound channels than round nose bullets
• Nickel-plated brass cases resist corrosion and aid extraction
• Flash-suppressed powder reduces muzzle flash in low-light conditions
• Consistent velocities within 25 fps standard deviation
• Compatible with all 10mm Auto firearms and feeding systems
• 20 rounds per box for range sessions and hunting applications

This load excels in hunting applications where deep penetration through heavy bone structure is required. The hard cast construction resists deformation when encountering tough game, maintaining bullet integrity for maximum energy transfer. Law enforcement agencies specify similar loads for barrier penetration capabilities, while competitive shooters appreciate the consistent accuracy and reduced leading compared to softer cast bullets.

Technical Specs

• Caliber: 10mm Auto
• Bullet Weight: 220 grains
• Bullet Type: Hard cast flat nose
• Muzzle Velocity: 1,200 fps (5-inch barrel)
• Muzzle Energy: 703 ft-lbs
• Case Material: Nickel-plated brass
• Primer: Small pistol
• Quantity: 20 rounds per box
• Manufacturer: Underwood Ammunition
• UPC: 816874020842

Underwood's quality control standards ensure each cartridge meets strict velocity and pressure specifications for reliable cycling in semi-automatic pistols. The hard cast bullet composition reduces barrel leading while maintaining accuracy standards demanded by serious shooters.