please dont worry bokmal, same old story as ever: ugly duck will becoming a swan!
I can see that something is possible and it will be play in the same league in the end.
and the cartridge , will be in the best society.

time for a little update: what happen till now:

got some old 9,3x57 Norma plastic tip on egun, 286 grain

anyone knows when it was in production

the little family

9x57 9,3x57 9,5x56

had have problems with 9x57 mauser brass. CIP standard give a max diameter on the base of 11,95mm but the chamber wont accept this. an old RWS round( impossible to say if pre or post war) measure 11,79mm and this was what the M 88 like. so I had to reduce the base diameter on the lathe. I dont believe that you find this problem in sporting rifles made after WW 1 but before 1900 there was no standard for chamber measurment's. its obvisious that RWS was aware of this problem.
I made a bullet rezising die for making .366 from .375 bullets, here on the left side with a 286 grain S&B for compare and a homemade bullet make from .222 Rem brass. lead core is a 8,15x46R Schuetzenrifle bullet, loaded with 9mm Parabellum die and crimped with 32 S&W die. base is turned on a lathe before resizing. will try it to aneal the brass so base turning wont be nessesary anymore.
on the rigth side is a die for resizing .429 bulllets to .424 for my 10,75x57. an orignal Speer 300 grain softpoint in .429 with the homemade version in .424. the 300 grain lead bullet comes from an old mould for the 11,15x60R. I had resize this to .440( for 11,2x60 schueler) and run it now into the .424 die again. will see if it works!