This is 45 Long Colt Ultramax 250gr. Round Nose Flat Point Ammo. Cowboy Action Shooting is a growing sport in the USA. Ultramax came up with a great solution, making ammunition twenty-first century accurate, with the authentic look and feel of the old days. It is brass cased, boxer primed and non-corrosive. This ammo comes packed in a unique 1800's inspired 50rd. box. Velocity: 730fps.