| 摘要 |
The invention provides a cartridge (30) for use in a firearm, the cartridge (30) having a projectile (42) mounted in or on a nose portion (36) thereof; the cartridge interior communicating with the projectile (42) via a gas passage (38), valve means (64, 66) for controlling propellant gas flow through the gas passage (38), and a movable member (50) which upon firing is propelled rearwardly from the cartridge (30) against a breech block of the firearm by the pressure of propellant gas within the cartridge (30) so as to recycle the firearm; characterised in that the valve means (64, 66) is arranged to close in order to stop or substantially reduce the flow of propellant gas through the said gas passage (38) after the projectile (42) has been fired from the cartridge (30), thereby to facilitate rearwards propulsion of the movable member (50).
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