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"Cal 30, short for 'Caliber .30,' refers to a common type of ammunition used in firearms. It signifies a bullet diameter of approximately 0.30 inches (7.62mm). The Cal 30 cartridge has been widely utilized in various firearms, including rifles and machine guns, for military and civilian applications. It has a long history of use, dating back to World War I and continues to be relevant in modern times. The Cal 30 ammunition offers a balance between power, accuracy, and recoil, making it suitable for a range of shooting scenarios."