Would like to ask those that have a drilling that is known to be chambered for the 9,3 x 72r round to please post proof info as found on the rifle barrels. What I am looking for is for both pre and post-WW1 era proof data in order to verify a drillings chambering that I will be considering for purchase. I have recently seen a few drilling for sale where the seller claims that the drilling is chambered in 9,3 x 72r but proof info does not seem to bear this out. Looking for conformation of my notes about the proof stamps for this cartridge at this stage of the game. thanks in advance! Jeff S.