To provide a shooting structure of a reusable projectile in a pellet shooting grenade usable in a war simulation game.

The grenade 10 includes a housing 12 containing at least one spiral launch tube, the launch tube having a breech end and muzzle ends 24, 26. A plurality of projectiles 18 are loaded in the launch tube between the breech and the muzzle ends 24, 26. The grenade 10 includes a gas reservoir for storing a compressed gas coupled to the breech end of the spiral launch tube. A valve is interposed between the reservoir and the breech end of the spiral launch tube for controlling the flow of compressed gas from the reservoir to the breech end of the spiral launch tube. The valve is moveable between a closed state and an open state wherein the compressed gas enters the breech end of the spiral launch tube to propel the projectiles 18 from the muzzle ends 24, 26, the valve being biased towards its open state.