10mm AUTO Reloading Brass Headstamps Are Mixed Washed and Polished Range Brass Mixed Primer Pockets Unprocessed Brass 100% Nickel Casings 500 Casings Reload using once|fired nickel|plated 10mm ACP brass, designed for durability and consistent performance. Known for its high velocity and energy, the 10mm Auto offers superior performance for both target shooting and hunting applications. Our nickel plated 10mm Auto once fired brass provides enhanced corrosion resistance and smoother feeding, making reloading more efficient.