At a 15-degree angle, the guns could fire a shell out to 23,000 yd (21,000 m). Propellant charge was four silk bags of smokeless powder, each of which weighed 105 lb (48 kg). At the time of their introduction they were intended to fire 1,400 lb (640 kg) armor-piercing (AP) projectiles containing a bursting charge of explosive D. They entered service in 1914 aboard Texas and her sister ship New York shortly after.

The design of the 14-inch/45 caliber dates to about 1910. The gun also saw service in the British Royal Navy, where it was designated BL 14 inch gun Mk II. The 14-inch/45 caliber guns were installed as the primary armament aboard all of the United States Navy's New York-class, Nevada-class, and Pennsylvania-class battleships. They were the first 14-inch (356 mm) guns to be employed by the United States Navy. The 14-inch/45 caliber gun, (spoken 'fourteen-inch-forty-five-caliber' ), whose variations were known initially as the Mark 1, 2, 3, and 5, and, when upgraded in the 1930s, were redesignated as the Mark 8, 9, 10, and 12. Crewmen aboard USS Texas pause to have their picture taken on top of one of the twin 14'/45 caliber gun turrets, 1918.

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