Practice round, for firing exercises or sporting use, has cartridge case with inner chamber of reduced diameter and reduced explosive content

摘要

The practice round has the inner chamber (4) of its cartridge case (1) with a reduced diameter, by having its outer wall thickened with a layer of resin. The volume of the chamber can also be reduced lengthwise, by having an elongated percussion element between the base (9) of the case and the primer (6), or by having an elongated axial rod between the explosive (5) and the projectile (2).