Russia / USSR
305 mm/62 (12") SM-33 Pattern 1948
This gun was designed for the Stalingrad (Pr. 82) class battlecruisers. A prototype gun was built in 1948 and was tested from 1949 to 1951. 12 guns were built before the project was cancelled in 1953 after Stalin's death.
The mounting for these guns was to have been controlled by the More-82 control system and to have a Grot radar rangefinder. Two Zalp FC radars were also part of the system
The gun was made from the tube, liner, casing and the breech. The breech was piston type, which opened up.
|Designation||30.5 cm/62 (12") SM-33|
|Ship Class Used On||Stalingrad (Pr. 82) class|
|Date Of Design||1948|
|Date In Service||N/A|
|Gun Weight||100 tons (101.58 mt)|
|Gun Length oa||746.5 in 18.960 m|
|Bore Length||732.3 in (18.600 m)|
|Rifling Length||596.9 in (15.160 m)|
|Rate Of Fire||3.26 rounds per minute (design)|
|Projectile Types and Weights||AP: 1,030 lbs. (467 kg)
SAP: 1,030 lbs. (467 kg)
HE: 1,030 lbs. (467 kg)
Long Range Shell: 508 lbs. (230.5 kg)
|Propellant Charge||508 lbs. (230.5 kg)|
|Muzzle Velocity||AP: 3,117 fps (950 mps)
SAP: 2,953 fps (900 mps)
HE: 2,297 fps (700 mps)
Long Range Shell: 4,265 fps (1,300 mps)
|Approximate Barrel Life||300 rounds|
|Ammunition stowage per gun||80 rounds|
|50 degrees||58,040 yards (53,070 m)|
|50 degrees||139,270 yards (127,350 m)|
I would use these numbers with a great deal of caution as these weapons never saw service.
|Range||Side Armor||Deck Armor|
|10,000 yards (9,140 m)||23.43 in (595 mm)||0.55 in (14 mm)|
|20,000 yards (18,290 m)||17.00 in (432 mm)||1.42 in (36 mm)|
|30,000 yards (27,430 m)||12.28 in (312 mm)||2.87 in (73 mm)|
Data from "Main Caliber of the Battleships."
|Elevation||-4 / +50 degrees|
|Rate of Elevation||10 degrees per second|
|Rate of Train||4.5 degrees per second|
|Gun Recoil||47 in (120 cm)|
- "Glavnyi Calibr Linkorov" (Main Caliber of the Battleships) by L.I. Amirkhanov and S.I. Titushkin
- "Battleships: Allied Battleships in World War II" by W.H. Garzke, Jr. and R.O. Dulin, Jr.
- "Entsiklopedia Otechestvennoi Artillerii" (Encyclopedia of Fatherland (Russian) Artillery) by A.V. Shirokorad
Special help from Vladimir Yakubov