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Winchester is proud to offer a complete line of centerfire handgun cartridges which are designed to provide you the ultimate protection in the form of a defensive cartridge. The Defender line begins with a nickel coated brass case which helps to ensure that feeding is reliable even in stubborn magazines and chambers. Next the cartridge is loaded with a proprietary mix of ball propellant that is clean burning and flash suppressed for shooting in low light conditions. A quality Winchester primer is used for consistent ignition giving you piece of mind when pulling the trigger. Finally the cherry on top is the Bonded Winchester Defender projectile. This modern take on projectile design allows for the core and jacket to be "welded" together in a proprietary process which yields higher weight retention and performance when compared to non bonded projectiles. When the shot counts, count on Winchester Defender.