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Comparative Penetration

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"Conclusions

1. As a result of trials of D-25 (122 mm) and D-10 (100 mm) tank guns, the following penetration ranges against the upper front plate of the Panther tank were established:

Gun

Shell

Distance of complete penetration

122 mm D-25

Armour piercing

2000

100 mm D-10

Armour piercing

1200

German 88 mm gun (Ferdinand SPG)

Armour piercing

600

German 75 mm gun (Panther tank)

Armour piercing

No penetration
Notes:
  1. The distance of complete penetration listed for the D-25 is not the maximum distance, as trials over a larger distance were not performed.
  2. The armour piercing shell of the German 88 mm gun (Ferdinand) does not penetrated the upper front plate of the Panther tank: the impact forms a breach and the shell ricochets.
  3. The distance of complete penetration listed for the D-10 is not the maximum distance, the maximum is 1300-1400 meters.
2. The armour piercing shell of the D-25 gun (122 mm) can penetrate an 85 mm thick armour plate at 55 degrees (upper front plate of a Panther tank) from 700 meters further away than the D-10.

3. The penetration of the armour piercing shell of the D-10 gun can be increased to penetrate from 1500-1600 meters (when firing at a Panther's upper front plate) if the muzzle velocity and shell quality are increased.

4. The practical rate of aimed fire of the D-25 obtained during trials (2.5 RPM) is insufficient and is limited by the amount of time it takes to reload the gun with the two piece shell.
The practical rate of fire of the D-10 gun (7.5 RPM) is good due to the one piece shell.

5. When firing at ranges up to 1500 meters with the D-25 and D-10, fire correction is complicated by the amount of gases emitted when firing."


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