Buffalo Bore Ammunition 8F20 Buffalo-Barnes 45-70 Government 300Gr Rifle Ammo - 20 Rounds - This powerful rifle ammunition manufactured with exacting standards with the gun owner in mind. Buffalo Bore produces strictly big bore ammo with massive firepower and dramatic results. Popular calibers include: 45-70 Magnum Lever gun,heavy .444 Marlin, Heavy 38-55 Winchester,Heavy 348 Winchester,50 Alaskan, Heavy 35 Remington, Sniper 223 Remington, Sniper 308 Winchester, Heavy 450 Marlin, Heavy 30/30.