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  2. BL 15-inch Mk I naval gun - Wikipedia

    en.wikipedia.org/wiki/BL_15-inch_Mk_I_naval_gun

    The barrel was 42 calibres long (i.e., length of bore was 15 in x 42 = 630 in) and was referred to as "15 inch/42". Overall length of gun: 650.4 inches, Weight of gun, excluding breech mechanism: 97 tons 3cwt. Weight of breech mechanism: 2 tons 17cwt. Rifling: polygroove, 76 grooves, uniform right-hand twist of one turn in 30 calibres.

  3. 12-inch/50-caliber Mark 8 gun - Wikipedia

    en.wikipedia.org/wiki/12-inch/50-caliber_Mark_8_gun

    The 12"/50 caliber gun Mark 8 was a US naval gun mounted on the Alaska-class cruiser. The gun, like the "large cruiser" that mounted it, was intended to fill the gap between US "heavy cruisers" (6-8") and US battleships (14-16"). The name describes the size of the shells, 12 inches in diameter, and the length of the bore in calibers (50 bore ...

  4. Wall gun - Wikipedia

    en.wikipedia.org/wiki/Wall_gun

    The wall gun or wall piece was a type of smoothbore firearm used in the 16th through 19th centuries by defending forces to break the advance of enemy troops. Essentially, it was a scaled-up version of the army's standard infantry musket , operating under the same principles, but with a bore of up to one-inch (25.4 mm) calibre .

  5. BL 12-inch railway gun - Wikipedia

    en.wikipedia.org/wiki/BL_12-inch_railway_gun

    The initial shock of firing was absorbed by a hydro-spring mechanism, allowing 34 inches (86 cm) of recoil within the gun mounting. The remaining recoil energy was absorbed by allowing the entire railway wagon to roll backwards 40 feet (12 m) [ 6 ] (Vickers carriage) or 3–4 yards (2.7–3.7 m) [ 7 ] (Armstrong carriage) against locked brakes.

  6. RBL 12-pounder 8 cwt Armstrong gun - Wikipedia

    en.wikipedia.org/wiki/RBL_12-pounder_8_cwt...

    The gun as originally adopted had a barrel 84 inches long, with a bore of 73.375 inches. The Royal Navy adopted a version with a 72-inch barrel, with a bore of 61.375 inches, by simply cutting 12 inches off the end, and from 1863 the shorter length was incorporated into a common version for both land and sea use. [4]

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  8. 12-inch/45-caliber Mark 5 gun - Wikipedia

    en.wikipedia.org/wiki/12-inch/45-caliber_Mark_5_gun

    The 12-inch (305 mm)/45-caliber Mark 5 naval gun was designed as an incremental improvement upon the preceding American naval gun, the 12-inch/40-caliber gun Mark 4. [1] As such, it was a very similar weapon, having been lengthened by 5 calibers to allow for improved muzzle velocity, range, and penetrating power.

  9. 10-inch/31-caliber gun - Wikipedia

    en.wikipedia.org/wiki/10-inch/31-caliber_gun

    The 10"/30 caliber gun Mark 2 was used as main armament on the remaining Amphitrite-class monitors, the monitor Monterey, and the armored cruiser Maine. [2] The Navy's Policy Board called for a variety of large caliber weapons in 1890, with ranges all the way up to 16-inch (406 mm). This 10-inch (254 mm) gun had been in development since 1885.

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