Shotgun cartridge

Claim 1

A CARTRIDGE COMPRISING: (A) A CYLINDRICALLY CONTOURED CARTRIDGE CASE INCLUDING A POWER CHARGE PORTION AND A SHOT-CHARGE PORTION; (B) A BASE INCLUDING A CYLINDRICAL WALL, A TRANSVERSE WALL ACROSS ONE END OF SAID CYLINDRICAL WALL, AND A PRIMER RECEIVING OPENING IN THE CENTER OF THE TRANSVERSE WALL; (C) SAID CYLINDRICAL WALL BEING CONCENTRICALLY MOUNTED AROUND THE POWDER CHARGE PORTION OF THE CASE; (D) A BASEWAD OF A SYNTHETIC PLASTIC MATERIAL DISPOSED WITHIN THE POWDER CHARGE PORTION OF THE CASE; (E) SAID BASEWAD HAVING A FORWARD EXTENDING FLEXIBLE SKIRT DEFINING A POWER CHARGE CAVITY, AND A FLASH HOLE AXIALLY COEXTENSIVE WITH SAID PRIMER RECEIVING OPENING AND OPENING INTO SAID CAVITY; (F) SAID BASEWAD INCLUDING THE SKIRT HAVING AN OUTER CIRCULAR SURFACE OF A DIMENSION SO AS TO BE SNUGLY RECEIVED IN THE CYLINDRICAL CARTRIDGE CASE; AND, (G) SAID SKIRT INCLUDING CIRCUMFERENTIAL SEALING RING PROTRUSIONS PROJECTING RADIALLY FROM THE OUTER SURFACE OF THE SKIRT WHEREBY THE FORCE OF AN EXPLODING POWDER CHARGE CAUSES SAID FLEXIBLE SKIRT TO EXPAND RADIALLY OUTWARD TO MOVE SAID SEALING RING PROTRUSIONS TIGHTLY AGAINST THE INNER SURFACE OF SAID CASE IN A GAS SEALING RELATION.