Has anyone ever heard of rebarrelng a Krag with a stepped barrel? I purchased a sporterized Krag with one. It chambers and ejects a regular 30-40 cartridge. When you put the bullet end of the cartridge into the muzzle, it gauges like a proper 30-40 with a very good muzzle condition. There are wrench marks on the barrel. I intend to shoot it using a Lead Sled and a long rope. What Mauser-type rifle/caliber barrel would interchange with the 30-40? Any assistance would be appreciated. LOBO