The armorer on Alec Baldwin's movie Rust got the max jail sentence.
1. Why would Hollywood (or NM in this case) ever take a working gun to a movie shoot.this was a revolver. So put a plug in the back of the barrel so it is impossible to fire or even chamber a round
2. Ban live ammunition totally at movie filming. Why would you ever need it?
3. You can use blanks but they can kill, too. One young male actor, Jon-Eric Hexum, pointed a gun with blanks in it at his head and pulled the trigger. Dead.
At West Point, before every field exercise with blanks, they gave us a safety demo where they fired a rifle with blanks and a blank adaptor at a piece of sheetrock. It blew a canteloupe-size hole in it.