Is the 9.3x66 Sako/370 Sako Mag. truly based on the 30-06 case? I know they share some dimensions but does that mean you can use '-06 brass to form the 370? Maybe 30-06 basic? I had heard that the 9.3/370 Sako has a beefed up web area and was designed so the hybrid powders that VihtaVuori was developing - N500 series - could be used.
