Rolf:
thanks for the advise. I use a "custom" 9.3 (.366) jacketed bullet of 193 gr we can get from a specialty shop named Buffalo Arms. They specialize in hard to find brass and bullets for reloading vintage guns.
As you note, there are S&B and RWS ammunitions ( mostly S&B). I find the RWS load much hotter loaded than the S&B. The bullet is much more impressive. I have only one Balck box of RWS that I have been able to find.
As you say, the 9.3 bullets have short friction surfaces to enable them to fitt the various bores.
Do you hunt or shoot with a similar drilling or combo gun??
I very much like the combo and drilling for hunting. Winged game, deer, boar, small game all with the same gun. How more practical can it be.
Thanks.