Underwood Ammo 10mm Auto 200 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo 20 Rounds. Specifications for Underwood Ammo 10mm Auto 200 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammunition: Manufacturer: Underwood Ammo Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Hard Cast Flat Nose (HCFN) Bullet Weight: 200 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 1250 ft/s Muzzle Energy: 694 ft-lbs Application: Target Package Type: Box Primer Style: Centerfire Lead Free: No Dimensions: 1.50 X 3.15 X 6.10 in Width: 3.15 in Height: 1.5 in Package Contents: Underwood Ammo 10mm Auto 200 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo Underwood Ammo 248: 10mm Auto 200 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo 20 Rounds