There seems to be a systemic problem in the Army with trusting soldiers with live ammo when tasked with base defence/checkpoints in garrison..... ie:
I asked about throwing my hat in the ring for BASF training, but when I read their SOP's and talked to some of the fellows on it during an event they were activated for, I decided against it. The security situation was deemed to be elevated enough to deploy the BASF with weapons and magazines, but not ammo. At that point I realised it was a giant waste of time and didn't bother following up on it.
After reading this thread though it seems the Navy has no qualms about giving pers (some with questionable quals?) live ammo to defend ports etc. Not a knock on the Navy, just pointing out the difference.