Winchester 10 MM Auto Pistol Ammunition is from a quality manufacturer of firearm ammunition. Features smokeless powder and stainless non-corrosive priming. Same high quality and precision is featured in the Pistol and Revolver ammunition as in the Rifle ammunition. The 10MM offers a unique combination of power, precision, reliable functioning, and on target performance. Delivers optimum penetration and rapid energy release with virtually no weight loss or bullet fragmentation.