Stan, I take it the box of Xpert Super-Trap loads you got was Lot #10240.
Xpert 12-gauge Super-Trap Load XT26HR7 1-2CS.jpg
The first time I see the Super-Trap Loads being specified with Hercules Red Dot (HR), Western MiniMax (WM) or DuPont MX (MX) is the December 24, 1936 Western Price List. Your shells with the Super-Seal Crimp would be 1939 or later and with the Seal-Tite wads up to 1946. By the April 1947, 11th Edition of the
Western Ammunition Handbook, the Seal-Tite wad was replaced with the Super-Seal Cup Wad. Actually Load No. XT26CS was dropped by the undated 9th Edition of the
Western Ammunition Handbook, as loads for ATA Trap Shooting had been limited to 1 1/8 ounce since April 1940.
Threaded Mode