I have an 1891 Argentine Mauser that belonged to my father. It was the first gun that I ever fired back in 1963. It fired a lot of corrosive ammo over the years and we didn't know about the proper cleaning. When it came into my hands in the late 1970's I (like a fool) thought it would be a great idea to take a hacksaw to it. Anyway, the barrel is now in pretty bad shape. I have a good original barrel now (in the white). Anyone know how likely it would be to screw the old one out and screw the new one in and have the head space end up right? Not worried about the front sight indexing as the new barrel has no front sight on it and I will be putting my scope back on it. I have a lathe if needed, but was just curious before I started this part of this lifelong build.