interesting idea but never heard it was done before. if you want something special make your own wildcat: 9,3x74
just turn of the rim and cut extactor groove

it was available once for the 8x75RS which is itself a 9,3x74R necked down.
this was a real family 8x75RS, 8x75R (I caliber, 8x75S and 8x75(I caliber)