Kuduae,

yes this reminds me, it was discussed a while ago and I wanted to send the original Swiss ballistics. Lancaster was very interested back then.
Here they are:

from an undated but probably post-WW II brochure, issued by "Eidg. Pulververwaltung Bern"

The same 13.1 g bullets were used for the Swiss 9.3x72R catridge, this was a strong load with muzzle velocity of 680 m/s, probably copying the German "Dornheim-Patrone".

What bullets and loads are you using now?

With the strong Swiss Franc, the asking price in Euro might be still quite attractive in Switzerland. I'm not sure if the extra shotgun barrels were included the last time?

Regards,
fuhrmann