I think I load my 8x57R/360 using 9.3X72R(CH4D) dies. I'd look around for a used set of RCBS 9.3X72R dies because chances are once you acquire a longarm chambered in one of the family of 360" BPE that you are going to acquire another. The 9.3X82R would be one of the family that may be difficult to reload using the 9.3X72R dies.

Kind Regards,

Raimey
rse