Underwood 648 10mm 140gr Xtreme Hunter Ammo - 20 Round Box

The Underwood 648 delivers maximum terminal performance in a 140-grain 10mm Auto configuration engineered for hunting and personal defense applications. This premium ammunition combines Underwood's high-velocity loading techniques with proven bullet technology to achieve superior penetration and expansion characteristics.

What Makes This Different

Unlike standard 10mm loads that often underperform factory specifications, the Underwood 648 maintains consistent velocities approaching 1,400 fps from a 5-inch barrel. The 140-grain Xtreme Hunter bullet features a solid copper construction with pre-stressed petals designed to expand reliably across velocity ranges from 1,200 to 1,600 fps. This loading produces approximately 610 foot-pounds of energy at the muzzle, significantly exceeding most commercial 10mm offerings.

Key Features

• 140-grain Xtreme Hunter solid copper bullet with controlled expansion design
• Muzzle velocity of 1,400 fps from 5-inch barrel (1,350 fps from 4.6-inch barrel)
• Muzzle energy of 610 ft-lbs delivering substantial stopping power
• Flash-suppressed powder reduces muzzle signature in low-light conditions
• Nickel-plated brass cases resist corrosion and enhance feeding reliability
• Compatible with all 10mm Auto firearms including Glock, Springfield, and 1911 platforms
• Manufactured to SAAMI specifications with consistent powder charges

Field testing demonstrates reliable expansion at impact velocities down to 1,200 fps while maintaining structural integrity for deep penetration. The solid copper construction eliminates lead fragmentation concerns, making this load suitable for hunting in lead-restricted areas. Accuracy testing from quality 10mm pistols typically produces 2-3 inch groups at 25 yards, with consistent point of impact across temperature ranges.

Technical Specs

• Caliber: 10mm Auto
• Bullet Weight: 140 grains
• Bullet Type: Xtreme Hunter solid copper hollow point
• Muzzle Velocity: 1,400 fps (5-inch barrel)
• Muzzle Energy: 610 ft-lbs
• Case Material: Nickel-plated brass
• Primer: Small pistol
• Quantity: 20 rounds per box
• Manufactured: United States

This ammunition represents a significant upgrade over standard 10mm loads for shooters requiring maximum terminal effectiveness. The combination of high velocity, controlled expansion, and consistent accuracy makes the Underwood 648 an excellent choice for serious applications where performance cannot be compromised.