Hi Daryl

My 1st 9.3X57 was the one I made on a Czech 98 action and I was using this load for it, so I just tried them in the M46 when I picked it up, and it shoots them very well. I think pressure is safe, but at the top of the scale for this cartridge if I were to guess. Primers just fill out a little bit and I got .0002" head expansion.

PPU 8X57 brass necked up to 9.3MM
CCI LR Primer
48.5 Grains of IMR4064
285 grain PPU round nose bullet.