They preform balisticaly as one would expect, howeaver they are suffering from a problem common to all guns in AH. Presently cannons and MG that have ammo chains that contain HEI/HE shels are unduly penilised in thier effect at range do to how AH handels the depreation of lethality at range. Weapons whith lower MV's are more readly noticed in this effect. Guns like All the MG-FF and the Type 99's are examples of this, Guns like the Breda's are also exampels of this but to a lesser degree.
HTC is aware of this and is looking into it, hopefully in AH2 we will see this adreased.