[RightDeve]

No, there is NO limit to supplying. What you just experienced is a mere probability check, where some units would be resupplied while the others not for a given turn. Also, since the number of your mortar units sucking the ammo is quite numerous, there's a lower probability that your helo will resupply at a given turn.

That's why I think putting some ammo units in a certain PBeM settings is quite gamey