Doesn't matter. Not how it works on a large production. Prop experts are in charge of safety. Actors do one thing, act. Sure they can produce, direct and act but when it comes to weapons they always have and hire advisors. Lots of contracts release the actor from such liabilities as well.

As far as killing, doesn't seem you know the power of guns. Brandon Lee died to a blank round with a piced inside because it was not previously cleared properly.

I'm sure you will make conspiracy theories though. It's what you do.