From the reading I've done this cartridge introduced by Sako a few years back is simply a 9.3x62 case stretched 4mm but still fitting in a 30-06 length action.
It appears to be another euro thing that isn't offered in north america although I see RCBS lists special order dies and Z Hat in the states is making custom brass. Anyone seen any rifles or reloading components for the 9.3x66 Sako in Canada by chance? 