I'm not sure if the armourer was even present as reports on that seem to conflict... but she should have been.
Again, not about what ideal situations we can dream up, but about what did happen in violation of safety protocols that otherwise work perfectly well.
Yes, but that basic competency does not always extend to knowing things like the differences between live wadded ammo and blank wadded ammo. That's why you're supposed to have the armourer doing it, with the actor having the right to watch if they feel the need for extra peace of mind.
So again, down to people on this set not doing their jobs and violating adequate safety protocols.
And indeed should, if safety is that much of a concern. But again, we've already established some lax attitudes in that regard on this set.
Should be, yes... but as with all the 'shoulds' above, people did not follow safety rules and this is the result.
I know the AD is responsible for general health & safety on set, but I wasn't aware they had responsibility for specific safety elements over and above the dedicated specialists... ie the armourer or electrician or something could overrule the AD on matters within their specialist area?
Well, with several decades of military experience behind me, I can quite readily recall numerous exercises where we were issued magazines already loaded with blanks, wherein we were expected to fire without first unloading and reloading upwards of 300 rounds to verify for our own personal peace of mind. Same for live rounds on the range. It was rare we'd get stripper-clipped rounds and even rarer we'd get handed boxed rounds. The only concession is that a couple of guys from your company would have been detailed to do the loading, so as long as you trusted them (or better yet, had been the one detailed yourself that day) it was all good.
While I would generally put the responsibility on the one pulling the trigger, things often work differently on a film set. Some things are off limits to everyone but the specific individuals responsible. You also do some things that are inherrently dangerous, often in front of the camera to help them prep the shot. I'd like to think that's what was happening here, but my cynicism is highly doubtful.