References:
100mm D-10 Tank Gun by Valeri Potapov
107mm Tank Gun ZIS-6 by Valeri Potapov

100mm Rifled Gun D-10

Diameter: 100mm
Caliber: L53.5
Pendulous Element Weight: 2,257 kg
Recoil Element Weight: 1,538 kg
Normal Recoil Length: 550mm
Maximum Recoil length: 650mm
Rate of Fire: 5 to 6 RPM

BR-412 APHE (WWII AP Shot)

Muzzle Velocity: 880 m/sec
Weight: 15.88 kg

Guaranteed Penetration (80% Probability)

125mm of RHA at 60 degrees at 500 meters
110mm of RHA at 60 degrees at 1000 meters
95mm of RHA at 60 degrees at 1500 meters
87mm of RHA at 60 degrees at 2000 meters

155mm of RHA at 90 degrees at 500 meters
135mm of RHA at 90 degrees at 1000 meters
115mm of RHA at 90 degrees at 1500 meters
100mm of RHA at 90 degrees at 2000 meters

Notes: During WWII; the D-10 was experimented with as a gun for heavy tanks, but due to the quality of German armor degrading, making the 122mm gun more effective against it; and the need for effective-anti fortification armament, the 122mm gun was chosen instead.

100mm Rifled Gun D-10TS

100mm Rifled Gun D-10T2S

107mm Rifled Gun ZIS-6

Diameter: 106.7mm
Caliber: L48.6
Recoil Length: 600 mm
Rate of Fire: 3.4 RPM

B-420 Shot

Muzzle Velocity: 830 m/sec
Weight: 18.86 kg

Guaranteed Penetration (80% Probability)

120mm of RHA at 60 degrees at 500 meters
108mm of RHA at 60 degrees at 1000 meters
92mm of RHA at 60 degrees at 1500 meters
86mm of RHA at 60 degrees at 2000 meters

140mm of RHA at 90 degrees at 500 meters
130mm of RHA at 90 degrees at 1000 meters
110mm of RHA at 90 degrees at 1500 meters
95mm of RHA at 90 degrees at 2000 meters

Notes: Development began in 1940. Due to the rifled barrel being produced in the Stalingrad factories; development was halted.

122mm Rifled Gun D-25

Muzzle Velocity: 795 m/sec
Penetration: 145mm of RHA @ 1,000 meters

122mm M-62T2 (2A17)

Muzzle Velocity: 950 m/sec
Penetration: 225mm of RHA @ 1,000 meters

Notes: Fitted with slotted muzzle brake to absorb up to 70% of recoil energy.

115mm Smoothbore Gun 2A20

115mm Smoothbore Gun 2A21 (D-68)

125mm Smoothbore Gun 2A26 (D-81T)

Year: 1966
Barrel Life: 350 EFC
Maximum Chamber Pressure: 5,100 bar

125mm Smoothbore Gun 2A26M2 (D-81T)

Year: 1969
Barrel Life: 600 EFC
Maximum Chamber Pressure: 5,100 bar

125mm Smoothbore Gun 2A46-1 (D-81TM)

Year: 1970
Barrel Life: 800 EFC
Maximum Chamber Pressure: 5,100 bar

125mm Smoothbore 2A46-2 (D-81K)

Year: 1976
Barrel Life: 800 EFC
Maximum Chamber Pressure: 5,100 bar

125mm Smoothbore 2A46M

Year: 1981
Barrel Life: 800 EFC
Maximum Chamber Pressure: 5,100 bar

125mm Smoothbore 2A46M1

Year: 1981
Barrel Life: 1,200 EFC
Maximum Chamber Pressure: 6,500 bar

125mm Smoothbore 2A46M-2

Year: 1992
Barrel Life: 1,200 EFC
Maximum Chamber Pressure: 6,500 bar

125mm Smoothbore 2A46M-4

Year: 2005
Barrel Life: 1,200 EFC
Maximum Chamber Pressure: 6,500 bar

125mm Smoothbore 2A46M-5

Year: 2005
Barrel Life: 1,200 EFC
Maximum Chamber Pressure: 6,500 bar

130mm Rifled Gun S-70

Caliber: 54
Weight: 4,255 kilograms
Recoil Length: 500 to 512 mm

Ammunition 1 Weight: 33.4 kg
Ammunition 1 Propellant: 13 kg
Ammunition 1 Speed: 900 m/sec
Ammunition 1 Penetration Example A: 163mm of RHA @ 30 Deg at 1000m
Ammunition 1 Penetration Example B: 143mm of RHA @ 30 Deg at 2000m

130mm Rifled Gun M-65

Caliber: 60
Weight: 4,060 kilograms
Recoil Length: 596 to 602mm
Ammunition: 33~ kg shell at 1,000 m/sec (15-16 MJ)