Abstract: A cartridge case assembly of the type constituted by internal wad, external extruded tube and intermediate body or welding mass, so characterized because the wad provides a house or cylindrical cavity hollow at the head side, in which a base element includes a promontory in peak form extending toward the head from a longitudinal shaft portion on which the fulminate rests, all gathered by the intermediate welding mass that fusion-weld the case with the wad, embracing the latter in such a way that the fulminate is included within it, forming an integrating monobloc of case, wad and fulminate, so that within the space of the fulminate housing appropriate weight and gas communication between the container chambers of the gun-powder adjacent to wad are provided.