Plastic cartridge case for artillery shot

A composite artillery cartridge case containing a metal bottom and a plastic body fixed to the metal bottom, the metal bottom includes a cylindrically shaped protrusion which includes a stepped hole, in which a primer for artillery cartridges is mounted by means of a threaded connection, as the metal bottom and the plastic body (3) are connected by a clamping fastening ring (4), and between the bottom of the plastic body (3) and the lower surface of the clamping fastening ring (4) is placed a sealing pad, characterized in that the metal bottom (1), is provided with inner radius and in which at least two blind holes are formed, with a diameter equal to 0.1 to 0.25 of the diameter of the metal bottom (1), and a depth of 0.35 to 0.5 of the thickness of the bottom of the metal bottom (1), and in the bottom of the plastic body (3) are formed at least two protruding, fixing elements (6), with a diameter equal from 0.1 to 0.25 of the diameter of the metal bottom (1), as the blind holes and the protruding fixing elements correspond in shape, size and location, whereby in the cylindrically shaped protrusion (6) of the metal bottom (1) threaded sector is made.