Why 40 rounds with DM23 on itpsv leopard?

Machinery of War Discussion Ground Vehicle
1

I have been wondering why I have only 40 rounds with dm23 on the itpsv leopard, does it historically have 40 rounds or is it just a glitch?

2

It is historical.

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These guns are dual feed, and they have a smaller compartment that is used to store anti tank munition. They were indeed that small.

3

Ok thanks for the clearness