118.35 is the gauge of the rifle's bore @ .340" (8.636mm). At this point in time an actual measurement was not made but plug gages were tried in steps. Next step up would have been a 108.49 gauge or .350" (8.89mm). Thus the bore accepted the .340" plug but not the .350" one. Note this was the size of the bore, the rifling grooves would have been cut deep enough to accommodate the 9.3mm bullet diameter. This system was used until around 1912 at which time the bores began to be marked in mm size.
The 2 grams of Schultz powder with 27 grams of shot is a comparatively light load. Schultz was a bulk smokeless powder which was measured by volume equal to black. A 3 dram volume measured 42 grains. this 2 gram ,load would have been about 31 grains or a 2.2 dram equivalent. An ounce = about 28.35 grams so the shot load was a bit lighter than an ounce. It is my understanding that very few shotguns were given Nitro Proof in Germany prior to 1912. Those that were had light loads specified. The proof laws were rewritten in 1912 to better accommodate smokeless powders & I believe at that point smokeless proof became mandatory.
