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.

Gun Characteristics

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)
Grooves 40
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 3.26 rounds per minute (design)


Type Bag
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)
Bursting Charge N/A
Projectile Length N/A
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)
Working Pressure N/A
Approximate Barrel Life 300 rounds
Ammunition stowage per gun 80 rounds


Range with 1,030 lbs. (467 kg) AP
Elevation Distance
50 degrees 58,040 yards (53,070 m)
Range with 508 lbs. (230.5 kg) Long Range
Elevation Distance
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.

Armor Penetration

Armor Penetration with 1,030 lbs. (467 kg) AP
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."

Mount/Turret Data

  • Three-gun Turret
    • Stalingrad (3): CM-31
Weight N/A
Elevation -4 / +50 degrees
Rate of Elevation 10 degrees per second
Train N/A
Rate of Train 4.5 degrees per second
Gun Recoil 47 in (120 cm)
Loading Angle N/A


Data from:

  • "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