The firm was known to make rifles in 11.2 x 72 Schuler as well as a few proprietary calibres. The 11.2x72 Schuler used a rebated case head to suit the 98 action. Allegedly a popular African big game cartridge in the German protectorates of the time. Bertram make brass for it.

Cartridge dimensions at
https://loaddata.com/Cartridge/112x72-Schuler/3060