Patent ID: RE40482

Claim:
In a practice An ammunition projectile cartridge comprising a hollow projectile and a cartridge case with a propellant charge, the projectile comprising a projectile head designed to withstand the forces applied when the projectile is fired from a gun and designed to burst when the projectile strikes a target and to receive ; wherein a marking agent is disposed in the head for optically indicating marking the impact with the target after the head has burst , ; wherein said marking agent contained in a burstable hood at the head of the practice projectile and comprising includes a plurality of chemical components each received in a separate frangible compartment in the head , said components being mixed and reacting chemically with each other as when the compartments break up, causing the optical marking reaction to be produced, the improvement mixed components to luminesce; and wherein the compartments are adapted designed to be broken up by at least one of the initial acceleration and the centrifugal forces on the projectile when in use, and wherein the hood is formed of an optically transparent material to enable the trajectory of the projectile to be tracked the projectile is fired from a gun, while retaining the chemical components in the head; whereby the components are mixed at the time the projectile is fired from a gun and luminesce by the time the projectile strikes the target .