I also have a 9,3x64 , it is an original Wilhelm Brenneke made in the Brenneke factory . From my research it has a FN Mauser action and a Bohler barrel . It appears to have been well used but is in good solid original condition . ( If anyone has any more information / opinions re this rifle please share ) I have not yet hunted with it or done any load development with it as yet .
When I bought it the previous owner had done a bit of load development and had decided on a 250 gr Barnes TSX bullet behind 62 gr of S341 ( South African powder ) which seems to have a lot of potential - I have only shot it at 50m and it grouped well . ( Target attached)
The rifle is a pleasure to shoot and I cant wait to get it into the bush to go hunting with it . The plan was to use it this year on one of my annual hunts but COVID laid waste to that plan , hopefully next year I will get a chance to use it .
Attached are some photos of it , apologies for not being the best photos but I hope good enough .