When I was an actor in college, I worked with dangerous props on a few occasions. We had one particular revolver that was used in a couple of on-stage and off-stage shootings over the course of the various plays. Although the gun was always loaded with blanks, someone familiar with guns would always open a training by shooting a piece of paper at close range, and then showing the paper to the cast and crew. Given how close the range was, there were always closely-bunched tiny holes in the paper.
The message was clear. Whatever you load into a gun for stage or screen work, it is always dangerous. Needless to say, I was never cast in a role where I would need to touch the gun, much less pull the trigger. For sall I know, theya re using the same gun nearly forty years later.