Scorch - Thank you for this info. Makes me wonder though as I have a 1908 7mm barrel stamped 7mm and also stamped Germany. I believe there is a few more engravings on it but don't recall at the moment. I wanted to build my own at one time but could use this barrel on my rifle if it ever shoots out but I very much doubt that. I felt sure a magnum load was out of the question. So as this barrel came from Germany, I guess more than the Mexican army put only 7mm on the side of the barrel? It can be confusing. Glad to hear about the 7x57. I asked at a gun shop here for 7mm. All he had were magnums, said he had no idea what I was looking for....shrug.