Some time back I bought a Krieghoff Ulm Primus O/U double rifle in caliber 7X65R. The rifle is still in Germany at my gun maker's. I have never been happy with the choice of caliber, which I consider inappropriate for a double rifle, so earlier this week I asked my gun maker if the barrels could be rebored to 8mm and rechambered to 8X65RS of 8X75RS. He replied that the barrels were large enough, but that he would recommend the 8X65RS. Since he is the one performing the work, I will bow to his recommendation. I already have a drilling with a rifle barrel in that caliber, so I am set up to load for it. I think a double rifle in the rimmed version of the 8X64S may be just the ticket for a Texas hog hunt.