Abstract: A training cartridge projectile includes a cylindrical base member, a cupaped plastic ogive member having its open end attached to the front end of the base member to form a color cavity and having an annular weakening groove; at least one leaf spring resiliently interposed between the ogive member and the front end of the base member; and a mass of aerosol-producing color material in the color cavity. On impact with a target, the ogive member breaks at the weak area, releasing the leaf spring, which snaps back to its original shape and thereby disseminates the color material into the air, thus producing an easily visible aerosol color signal in the region of impact.