Abstract: A high density perforating gun having series connected multiple gun housings within which a plurality of jet perforating shaped charges are arranged in spaced apart clusters. The charges of each cluster are captured in radially spaced apart symmetrical relationship within a mounting assembly, and each housing includes a plurality of the mounting assemblies which are spaced vertically apart from one another. The charges contained within each mounting assembly are orientated respective to the charges of the remaining mounting assemblies so that any charge located in one mounting assembly is spaced apart both radially and vertically from the nearest adjacent charge of an adjacent mounting assembly. This arrangement permits a maximum number of shaped charges to be placed within a finite volume. All of the charges contained within one housing are simultaneously detonated.