Cartridges designed for .40 caliber handguns can feature projectiles constructed of hardened materials intended to defeat body armor or other protective barriers. These specialized rounds typically utilize a core of tungsten carbide or other dense metals, often jacketed in a softer material like copper. This construction allows for deeper penetration than standard projectiles.
The development of such ammunition stems from the increasing use of protective gear by both law enforcement and military personnel. Historically, concerns about the potential misuse of these rounds have led to regulations and restrictions regarding their manufacture and sale in certain jurisdictions. This potential for misuse underscores the importance of responsible firearm ownership and adherence to all applicable laws. The use of such ammunition raises complex ethical and legal questions regarding public safety and the balance between individual rights and collective security.