Why use those ammo units anyway?
The AI can't so unless you are planning wasting rounds on a huge constant bombardment on blank areas, against the AI it makes little sense,as ammo units can be more determental than beneficial, as the AI
will CB fire.
I rarely see a ammo truck in PBEM ,
until it explodes usually when they are in the reloading process,
With good effective Atry management,there is no need for ammo units imo.