Abstract: The present invention provides for a shotgun shell hull for a shotgun of a greater gauge that can be loaded with the standard load of a lesser gauge. In one embodiment, the shotgun shell hull is comprised of (i) a tubular casing having an outer diameter of about a greater gauge and an inside diameter of about a lesser gauge; (ii) a primer receiver located on a first end of the tubular casing, configured to receive a primer and having a rim for retaining the tubular casing within a firing chamber of a shotgun of the greater gauge; and (iii) a closure located on a second end of the tubular casing distal to the first end and configured to retain a charge for the lesser gauge in the tubular casing until the primer is ignited.