Probably the only reason why this caliber is still nominated is the love affair with H.Goering, as written before. Nowaday, probably, there are better calibers for doubles. The 30R Blaser probably could be a good choice, with several factory loads available. Blaser has a K95 in production, chambered in 8x68S. If it's possible to built a kipplauf in this caliber... Well...
A double in 8x68S should be THE weapon.
Doc