Can I ask what the point of this screed was? I'm aware blanks are dangerous. That's irrelevant. There was a real bullet in the chamber. At some point, even if it was a blank, it would have been pointed at someone and the trigger pulled.
The point appears to be "check the damn weapon", which of course you could have said without 'educating' me, and wouldn't have been undercut with going on endlessly about wadding.
That point is a terrible one because the armourer is the expert, and is the one who should be signing the gun off as safe every time it is opened, not an actor who neither is required to have qualifications nor skills in clearing a gun as safe. If an actor interferes with the weapon, the armourer has to check it again.