These high - velocity guns were the same as those mounted on the Panzer IV for anti-tank use .
The heavy steel wall high - velocity shells carried much less explosive and had a lower blast effect for use against infantry or field fortifications .
These high - velocity guns were the same as those mounted on the Panzer IV for anti-tank use but the heavy steel wall high - velocity shells carried much less explosive and had a lower blast effect for use against infantry or field fortifications .