I had a 9.3x375 made (AKA 9.3 Canadienne), as I could not get brass for a 9.3x64. Reamer from PTG, dies from Hornady, simple neck down procedure to make Ammo, using Hornady brass in either 375 or 416 denomination.
2 guns were made one on an AboltIII/300WM, one on an FN Mauser, both with Heym...