To make 8x68S brass from .375 H&H brass - easily done. Turn the belt to .522", trim to length, chamfer and size placing the shoulder for a crush fit.
Fireform with standard 8x68S loads.
I had no difficulty with brass strength and had no 90 degree bends.

Maybe that would happen in the Newton, but not in the 8x68 nor the 9.5x68 in my case.