Sorry John EP. The question about the .260 is a legitimate question relative to the post. It is exactly the question I was going to ask. No one on this forum will say don't do it unless thier are real reasons for not doing it. For instance you say you would have to take a half inch off the breach end of the barrel but that may mean you will not have enough dia left to thread for the barrel nut. Depends on the taper of the barrel. More informed people may come on here with other valid reasons why you can or cannot do what you want. If it is doable you will be told so and to go do it if that is what you truly want. And I say, go for it if doable.

El Lobo