I just got through reading about the 9.3x66 Sako cartridge. It's about .36 cal. with near .375 H&H mag power. The case is the same diameter as an 06 case and about 1/10th of an inch longer with the same OAL as a 30-0 round. The shoulder is set forward for more powder capacity and has a 34 degree shoulder angle. It would fit the magazine and action and has more crunch than the Whelen. Now all we've got to do is find someone brave enough to shot one. Man, talk about kick! I wouldn't need one but it would make a good big bear rifle.