Underwood Ammo .458 HAM'R 300 Grain Polymer Tipped Spitzer Brass Cased Rifle Ammo 20 Rounds. Specifications for Underwood Ammo .458 HAM'R 300 Grain Polymer Tipped Spitzer Brass Cased Rifle Ammunition: Manufacturer: Underwood Ammo Caliber: .458 HAM'R Number of Rounds: 20 Bullet Type: Jacketed Soft Point (JSP) Bullet Weight: 300 grain Cartridge Case Material: Brass Muzzle Velocity: 2100 ft/s Muzzle Energy: 2938 ft-lbs Application: Hunting Package Type: Box Primer Style: Centerfire G1 Ballistic Coefficient: 0.197 Lead Free: No Projectile Caliber: .458 Caliber Dimensions: 2.30 X 3.25 X 5.00 in Width: 3.25 in Package Contents: Underwood Ammo .458 HAM'R 300 Grain Polymer Tipped Spitzer Brass Cased Rifle Ammo What is Underwood Ammo .458 HAM'R 300 Grain Polymer Tipped Spitzer Brass Cased Rifle Ammunition good for? The manufacturer says that it is suitable for hunting.Underwood Ammo 465: .458 HAM'R 300 Grain Polymer Tipped Spitzer Brass Cased Rifle Ammo 20 Rounds