Hi,
I am not sure about the FAC but both times the firearms officer came round to visit regarding my SGC its been relatively informal. The first guy did ask where I would be shooting though and where I intended to keep cartridges but he knew that my dad had a shotgun for years so he seemed a bit more relaxed maybe? The second guy was equally relaxed but this was for a change of address and so knew I had already been inspected before, think he just asked how many guns the cabinet took, might have been for his records?
I guess it depends on the character of the guy that looks after you