Hello,
New Orleans, John Doe captain with Expert Loader. When switching ammo type using expert loader, sometimes, the guns will not fire (at least I think that is causing it).
Switching from one to the other (using expert loader) will not work.
Solution:
While having one ammo type loaded (let's say AP), load HE and during the 3-4 seconds while it loads, select AP again - this will cause the ammo to load for the full 12 seconds and then you can fire again.
Haven't been able to reproduce on purpose in co-op.
Thanks