Cartridges designed for theatrical productions, firearms training, and certain sporting events often contain a propellant charge but no projectile. These cartridges produce a muzzle flash and a report similar to live ammunition but without firing a solid bullet. A common example includes crimped casing or a wad of paper or plastic where the bullet would typically reside.
The ability to create realistic effects without the inherent danger of live rounds makes this specialized ammunition invaluable for film and stage, as well as for historical reenactments. It also plays a crucial role in dog training and competitive shooting disciplines, allowing participants to practice techniques and build confidence in a safe environment. Historically, these types of rounds have also seen use in starting races and signaling.