1. In an explosive assembly, in combination, primary and secondary explosive charges; directing means common to both of said charges and cooperating therewith for directing the blasts from both of said charges along the same path in the same direction toward a given target; and means operatively connected to both charges for igniting said secondary explosive charge at an interval of 10-150 microseconds subsequent to the ignition of said primary charge, whereby the blast from said secondary charge will enter an area which has previously been entered by the blast of said primary charge to augment the destructive effects of said primary charge.

2. In an explosive assembly, in combination, an annular secondary explosive charge forming the forwardmost explosive charge of the assembly; tubular directing means operatively connected to said secondary charge and extending forwardly therefrom for directing the blast from said secondary charge along a given path to a given target; a primary explosive charge coaxially aligned with and located rearwardly of said secondary charge so that the blast from said primary charge will pass through said secondary charge to also be guided by said tubular directing means toward said target; and means operatively connected to both of said charges for igniting said secondary charge at a time interval of 10-150 microseconds after said primary charge whereby the blast from said secondary charge will increase the destructive effects of the blast of said primary charge.

3. In an explosive assembly, in combination, an annular secondary explosive charge forming the forwardmost explosive charge of the assembly; tubular directing means operatively connected to said secondary charge and extending forwardly therefrom for directing the blast from said secondary charge along a given path to a given target; a primary explosive charge coaxially aligned with and located rearwardly of said secondary charge so that the blast from said primary charge will pass through said secondary charge to also be guided by said tubular directing means toward said target; and means operatively connected to both of said charges for igniting said secondary charge at a time interval of 10-150 microseconds after said primary charge whereby the blast from said secondary charge will increase the destructive effects of the blast of said primary charge, said secondary charge having a cylindrical bore through which the blast of said primary charge is guided to said tubular directing means.

4. In an explosive assembly, in combination, an annular secondary explosive charge forming the forwardmost explosive charge of the assembly; tubular directing means operatively connected to and extending forwardly from said secondary charge for directing the blast thereof along a given path to a given target; a primary explosive charge located rearwardly of and coaxially aligned with said secondary charge; second directinG means of substantial thickness located between and operatively engaging said primary and secondary charges for directing the blast of said primary charge through said secondary charge into said first-mentioned tubular directing means; and means operatively connected to both of said charges for igniting said secondary charge at a time interval of 10-150 microseconds after said primary charge is ignited whereby the blast from said secondary charge will enter an area which has previously been occupied by the blast of said primary charge so that the blast of said secondary charge will increase the destructive effects of the blast of said primary charge.

5. In an explosive assembly, in combination, an annular secondary explosive charge forming the forwardmost explosive charge of the assembly; tubular directing means operatively connected to and extending forwardly from said secondary charge for directing the blast thereof along a given path to a given target; a primary explosive charge located rearwardly of and coaxially aligned with said secondary charge; second directing means of substantial thickness located between and operatively engaging said primary and secondary charges for directing the blast of said primary charge through said secondary charge into said first-mentioned tubular directing means; and means operatively connected to both of said charges for igniting said secondary charge at a time interval of 10-150 microseconds after said primary charge is ignited whereby the blast from said secondary charge will enter an area which has previously been occupied by the blast of said primary charge so that the blast of said secondary charge will increase the destructive effects of the blast of said primary charge, both of said directing means having inner frustoconical surfaces and respectively having smaller ends of said inner frustoconical surfaces located closer to the target than the larger ends thereof, respectively.