@arkandel I think that some of the details in the comments from Clooney and a similar interview from McConaughey show why there are concerns about leaving the safety checks up to actors with minimal experience.
"I mean every time I get handed a six-gun," or a gun that holds six cartridges, "you point it at the ground and you squeeze it six times," Clooney said, noting "It's just insane" not to.
You can't do that if the gun is loaded with blanks. You could shoot yourself in the foot with a blank (which may have been what happened in another Rust set incident).
"You hear 'cold' -- now I want a visual," said the Texan star. (McConaughey) "If you and I are in a scene together, I need to give you visual. If it's a six shooter, do you see light through all six holes?
You can't do that when a six-shooter is loaded with dummy rounds for the shot.
"I've never heard the term 'cold gun,'" Clooney said of his years of movie-making. "I've never heard that term. Literally. They're just talking about stuff I've never heard of. It's just infuriating."
Numerous armorers have spoken about the term "cold gun" and "hot gun" in recent interviews. Even McConaughey mentions the term in his interview.
They mean well, but this is just showing how their field of expertise is different from that of armorers, which is why the safety protocols are designed the way they are and why you don't want actors freelancing their own personal safety protocols.