Hello Grandveneur,

I hope I can contribute some further clarification.

Some years ago there was an article in a German magazine „caliber” about this cartridge.
Based on what Rolf Ziegenhahn, the senior chief of the Ziegenhahn Company, told the writer the story is in short.
At about spring time in 1986 the old Schueler facility building had to make way for a new planed modern estate in Suhl.
Rolf Ziegenhahn had been informed too late about the planed demolition of the building so he arrived late for finding nearly one hundred chamber reamers in the rubble. Without searching for something special he found an old catalogue sheet in which he realized a cartridge with the name .404 Magnum Schueler. In addition the rifle model in which the cartridges were offered was mentioned as Mod 34.

With further investigations Rolf found two not fired empty cases without head stamp on a wooden board in the proof house of Suhl. One was a .500 Schueler (12,5x70) while the other was an unfired .404 Magnum Schueler.

The brass for the batch of new made cases is reformed and belt turned from Weatherby cases later fitted with the Zi-Di head stamp.

Robert