Winchester Unprimed Brass Cases 45-70 Government (50pk)Each and every piece of Winchester brass is made to meet and exceed the most demanding quality control and performance standards in the industry. New, unprimed brass. This is not loaded ammunition. Technical Information Caliber: 45 70 Government Finish: Brass Preparation: Due to the manufacturing process and or shipping, case mouths may not be perfectly round. To ensure a round case mouth, cases must be sized (or have the expander ball of the sizing