[NorthMountain]

Blanks look nothing like a live round unless you are drunk, stoned or blind.

Or you're an actor and:

1) Too bloody ignorant to know the difference and

2) Too bloody stupid to CHECK YOUR DAMN PROPS before going on stage ...

[Rodamala]

This is why there is a property master on location.

[Finny]

There's a huge difference between a reenactor of historic events like Civil War battles and the Gunfight at the O.K. Corral, and an actor who portrays a character on stage or screen.

Reenactors of historic armed conflicts are probably more knowledgeable about the firearms they're using than you have any idea.

I think IMR 4350 has the more likely explanation in post #10.