It seems that most of the Krieghoff double rifles in the Big Five range are in .470 Nitro, but I understand that .458 Win Mag is also offered. I'm looking to buy one after going down to the NRA convention, and my thoughts were that one in .458 would be somewhat easier on the shoulder, and as the cost of ammunition would be so much less I'd actually be able to practice shooting it a bit. I realize that .470 offers a bit more punch, but also has a rim, while the .458 only has a belt. Does anyone know of any issues with the rifles in .458 that would dissuade you? I intend on bringing this rifle to Africa for lion and buff.