Rifle loonies are exactly that .... loony! I had mine built before the 9.6 x62 was commonly available. In fact there is no ammo available for it here in town without special order. If I have to go to that trouble, why not just make your own.
If one were ultimately practicle, why not just buy a light weight .375 Ruger, shoot 235 gr. TSX's at 2850 fps., and be done with it.
