With what is called "ammunition refilling" (in vanilla or in #valour), you should not expect to find the full amount of ammunition that was there at the start of the mission, whether for a soldier or for a vehicle.
In the case of a soldier with an MP 40 initially equipped with 200 or 300 9mm cartridges (and now without any ammo), the weapon will only be resupplied in #valour with 6 magazines of 32 cartridges (i.e. a total of 192 usable by the weapon, and not one more : no other "extra" or "bonus" ammunition will not be added to inventory).
Ditto for a tank, like a Panther, which could have 50 armor-piercing shells and 27 high-explosives shells at the start, it will only receive what is provided by the automatic reload (that is to say 20 AP and 15 FG), if its shell bays are totally emptied. But if not totally empty (still more than 20 AP shells or more than 15 FG shells), no change to the number of available ammo will take place.
This is what may suggest that the refilling of ammunition hasn't been carried out.
A little frustrating, but that's the mechanics of the game !
Cheers.

two man machine gun teams were not getting ammo they would run dry and refill I would run the supply truck up to them and they get not even a bullet soo yeah it does work for big guns and infantry and tanks to refill there ammo but machine gun teams seem to be bugged for that I don't know what to tell you man was testing all of this a few hours last night and yeah I just got stuck and need a better understanding of the supply mechanics is there a video out there that could help?

nadog, were you able to figure it out? Im running to the same problem.