Spin-stabilized projectile that expels a payload

A spin-stabilized projectile comprising a body enclosing a payload formed by a group of sub-projectiles which can be dispersed over a trajectory under the action of a pyrotechnic charge integral with a rear part of the body, the body carrying at its front part a ballistic warhead, the payload being entirely ejected from the body by projecting toward the front of the projectile a piston slidably mounted in the body, wherein the pyrotechnic charge is composed of a detonation relay that is separated from the payload by the piston, the piston comprising a recess covering and surrounding the detonation relay, the latter being not directly in contact with the piston.