I bought a beautiful, Niedner, G&H, Shelhamer, Kornbrath 1903 in .257R only to find out it had been "improved". I really look forward to sharing this one with all of you. I am going to great lengths with this one to make it right. I agree with most of what has been said here, use Cerosafe first. I would not fire anything in the rifle until. Just to easy to get a precise cast and then you will know what you have. It seems like a lot of trouble but is very simple to do. I keep a couple of extras just in case.