Let me post a parallel to this case. The death of Brandon Lee, by a prop gun loaded with blanks.
As a nearly month-long police investigation draws to a close, North Carolina District Attorney Jerry Spivey announces...
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Around midnight on the morning of March 31, the cast and crew were filming a scene at Carolco Studios in Wilmington, North Carolina. As Lee entered a room, another actor shot him from a distance of 15-20 feet. Though the gun was supposed to have been loaded with blanks, police later found that a .44 bullet entered Lee’s abdomen and lodged in his spine, fatally wounding him. He died in the hospital hours later of internal injuries, blood loss and heart failure.
Hollowed-out cartridges are often used to film close-ups of a gun being loaded; the “dummy” cartridges are then supposed to be removed and replaced with blanks before being fired. The police investigation into Lee’s death concluded that a tip of one of the cartridge’s bullets broke off from the cartridge and lodged in the gun, then fired at Lee along with the blank.
D.A. Spivey eventually decided against bringing charges against Crowvision, the production company making the movie.