Cases can be formed from 9.3x72R, or can be bought from Bertram and Horneber. Husquarna appears to have used real 9.3 mm barrels, so .364 - .366 bullets should be fine. But they need to be lead, or with a thin jacket only, not the modern heavy-jacketed bullets for 9.3x62 oder 74R. I have copies of a Scandinavian article with plenty of information including loading data which I can send you by email, and some own experience.
Please take note that case dimensions for the 9.3x57R/360 and for the .360 / 2 1/4 are a bit different, and dies for the English case may not work.

Fuhrmann