Great article Doc!
Yes the 9.3x64 can do lighter loads as well, the 270gn Speers are very accurate at 2100-2200fps & flattens deer & pigs - exits are common!
I achieved factory specs with the 293gn TUG of 2570fps, that wasn't too bad accuracy wise either.
My rifle is far more accurate than I can shoot, the RWS ammo clocked 2640fps Average in my rifle & they were in a touching cluster at 50m; (not me shooting those) so yes they really are a super round.
Shame you only did the heavier Woodleigh protected points, the 286gn ones get just over the 2630fps with a deviation under 10fps.
I only use AR2209 for the heavier loads & AR2208 for the lighter 270gn loads.
I have tried the Woodleigh Hydros (Mk1's) which unfortunately didn't feed well at all, there is now a Mk2 out now which has a protected cap & should feed much better - alas I haven't tried these yet!
Please keep up the good work on this fine old cartridge mate, if there is enough call for it then we will hopefully get a major company beside Voere to chamber this magnificent old round.
Cheers