Blank cartridges used in “prop guns”
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A “prop gun” loaded with a blank cartridge still has the potential
to harm or even kill, because while it does away with the bullet, the gunpowder remains with its associated explosive power
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Live round

Blank

No projectile: Shell that houses bullet is crimped over

Projectile Casing: Metal shell

Propellant: Blanks can be loaded with more powder than live round to give convincing gunshot sound and brighter muzzle flash

Primer: Responds to strike of firing pin to ignite propellant


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Source: Dave Brown, American Cinematographer
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