Abstract: The invention relates to an explosive projectile comprising an explosive charge and a device for firing a detonator outside of the charge, characterized in that the explosive charge comprises a recess, in that the projectile comprises a device for priming this explosive charge comprising an explosive relay housed at all times at least partially in the recess in the explosive charge and mounted to slide therein between a retracted safety position in the explosive charge for which the relay is kept remote from the detonator and a forward armed position in which this relay is situated in the immediate proximity of the detonator or is in contact therewith, while being partially engaged in the explosive mass, and in that it also comprises a device for locking the explosive relay in its retracted safety position.