Ladies & Gentlemen!
Don't forget you have a historic doublegun. Nitropowders in the days of the youth of this gun have not been the same as today! So do not try to use highspeedloads from the present.
Der Ami: 118/35 marked under crown and U is describing the loads used for the proof at the Beschussamt! At this time, the first test and the 2nd test werde done with different powder loads and the bullet weight was the same. But it's not the load for using the gun in normal condition.
I always smile when i read this table down at the site: http://www.germanguns.com/tech.html
If you use the RWS .364 TMFK for propper hand loads try to get some of the S&B TMFK bullets. The copper mantle from the S&B is not as hard as the RWS bullet! ;-)And all the old expressguns will thank you! :-)

Sorry for my broken english, i need a lot of practice!
Martin