I am going to machine a sizing die to take .375" Bullets and bring them down to .366" in my press. I intend to try the Speer 235 grain bullets and see how well they work.
The Norma 232 grain bullets get very good reports, but are hard to find and quite expensive.
I expect if I don't like how the 235 Speer's do on game I can simply shoot them for fun and practice and kill game with the Norma's.
By taking a 7/8X14 grade 8 bolt and drilling a hole through it you can then ream about 3/4 of the hole to 375 and the last 1/4 to 366. You make a punch like a shell holder to push the bullets point upwards through the hole. The punch needs to be .364" The bullets are swedged down to .366" and pop out the top ready to load in any 9.3MM rifle.
250, 270 and 285 grain bullets are easily available now in .366, but the only "light weight" 9.3MM bullets I know of made today are the 232 Norma's and the 220 grain Fox bullets.
I have a 9.3X74R and I will soon have my own 9.3X62. I will use the 286 grain bullets in them. But for my 9.3X57 I was thinking the 220-235 grain range may be a bit better way to go. Nosler makes a 250 grain AccuBond too, but hard to get and expensive, so practice shooting can get costly.