Underwood Ammo .357 Sig 65 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammo 20 Rounds. Specifications for Underwood Ammo .357 Sig 65 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammunition: Manufacturer: Underwood Ammo Caliber: .357 SIG Number of Rounds: 20 Bullet Type: Monolithic Bullet Weight: 65 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 2100 ft/s Muzzle Energy: 637 ft-lbs Application: Hunting Package Type: Box Primer Style: Centerfire Lead Free: Yes Dimensions: 1.40 X 3.30 X 4.95 in Width: 3.3 in Package Contents: Underwood Ammo .357 Sig 65 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammo Underwood Ammo 855: .357 Sig 65 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammo 20 Rounds