Hi,
Yes,that was it,sorry I did not see the 'Ammo' box on the floor.

Hi Astaroth,
No I have no MODS installed.
I have tried on other base camps but this only (so far) has happened on the 'Bomos' camp,as I say I can have ammo in my weapon,but if I swap for any weapon in the 're-arm' house,the ammo counter goes down to nil.