Those Lubaloy loads were mighty spendy. The list price of the RECORD 3-inch Super-X load with 1 3/8 ounce of chilled shot was $68.50 per thousand.
Lubaloy Shot Folder 5-30 page 5.jpg
For 1931, Western Cartridge Co. began loading all their smokeless powder shotgun shells with non-corrosive primers.
By 1933, Western Cartridge Co. was advertising their Seal-Tite wad in the Super-X loads --
Seal-Tite Wad.JPG
The Super-X loads continued to evolve. To my mind, the Super-X came of age, shortly after I was born, when they got the Super-Seal Cup Wad and the Super-Seal Crimp --
1948 Super-Seal Cup Wads ad.jpg