Magtech considers all their components "factory fresh". This means they are made to the same standards as their factory loads. All shotshell brass hulls use large pistol primers. They were designed for use with cork, fiber or cardboard wads and are ideal for use with blackpowder.Special Note about Magtech Brass Hulls: These hulls were designed for use with shotguns with a 2-1/2" chamber. The hulls are cut short so they'll fit in shorter chambers. The length in the description was designed to make it easier for customers to search on the product. Actual Length of Hull: 2.45"Companhia Brasileira de Cartuchos (CBC) is a company in Sao Paulo, Brazil that manufacturers and distributes Magtech, Sellier & Bellot and MEN ammunition. Since 1926, CBC has manufactured its own components, bringing their customers full quality control over every stage of the manufacturing process as well as the final product. Their goal is to market the best ammunition in the industry.