Winchester is the largest small caliber ammunition enterprise in the world and the leader in delivering innovative ammunition products to hunters, sport shooters, law enforcement and the U.S. Warfighter. In the field, on the range or in defense of freedom around the globe, Winchester has the right product for any ammunition need. The 157-year-old Winchester brand is built on integrity, hard work and a deep focus on its loyal customers. Winchester, The American Legend. Born Here. Built Here.