I noticed that the Maus’s 128 mm main gun sounds exactly the same as the ZTZ99A’s 125 mm gun. Does that make sense?
The chamber pressures must be very different, right? Having identical firing sounds seems hard to justify.
Cannons sound effects in-game is based on caliber size and not based on model, manufacturer, nation and other features with a few exceptions like the 122 mm and the ‘clank’ sound effect after firing the projectile.