Self-lubricating ammunition

Claim 1

SELF LUBRICATING AMMUNITION COMPRISING IN COMBINATION, AN ELOGATED CARTRIDGE SHELL HAVING AN EXPLOSIVE CHARGE THEREIN, A SUBSTANTIALLY SOLID PROJECTILE HAVING A BODY INCLUDING OPPOSITELY DISPOSED NOSE AND BASE PORTIONS, SAID BASE PORTION BEING CYLINDRICAL AND SAID NOSE PORTION TAPERING FORWARDLY FROM SAID BASE PORTION, SAID BODY BEING DETACHABLY CONNECTED AT SAID BASE PORTION TO SAID CARTRIDGE SHELL SO AS TO BE PROPELLED THROUGH THE BARREL OF A WEAPON UPON FIRING THEREOFF, SAID BASE PORTION HAVING A FLAT REAR SURFACE EXTENDING GENERALLY PERPENDICULAR TO THE AXIS OF SAID BODY, SAID BODY HAVING A SINGLE CENTRALLY DISPOSED CAVITY EXTENDING AXIALLY FROM SAID REAR SURFACE INTO SAID BASE PORTION, SAID CAVITY BEING RELATIVELY SHALLOW WITH RESPECT TO THE LENGTH OF SAID BASE PORTION, SAID CAVITY BEING COMPLETELY CLOSED AT ONE END THEREOF BY A CONCAVE SHAPED END WALL SURFACE AND OPENING AT ITS OTHER END ONTO SAID REAR SURFACE OF SAID BASE PORTION, SO AS TO BE EXPOSED TO THE EXPLOSIVE CHARGE IN SAID CARTRIDGE SHELL, THE AREA OF SAID CAVITY AT SAID REAR SURFACE BEING NO GREATER THAN ONE-FOURTH THE AREA OF SAID SURFACE TO MINIMIZE THE EFFECT OF SAID CAVITY ON SAID EXPLOSIVE CHARGE, AND SAID CAVITY BEING COMPLETELY FILLED WITH A LUBRICANT TO BE DISTRIBUTED REARWARDLY THEREFROM RELATIVE TO FORWARD MOVEMENT OF SAID PROJECTILE AND AGAINST THE INTERIOR SURFACES OF THE BARREL OF SAID WEAPON UNDER THE EXPANSIVE FORCE FROM SAID EXPLOSIVE CHARGE.