I don't know if I am the only one with this problem. But certain ammo types are broken. 75x350mmR Shells for example. You can't craft them anywhere. They show up in the Research Tab, but I can't make them anywhere. I can use Character Editor to cheat them into a pawn's inventory, but I can't drop them them. And if I cheat in a vehicle that uses them, like the Bulldog, I can cheat ammo in with Devmode, but when I drop them, nothing appears.
Please Help, this is so frustrating.