Does it not shoot well now ?
the 260 is a great long range round probably equal to the 308 if not a little better if you reload. Why the change?
Anyway , The only smiths that I can vouch for by actualy having work done by them is
Darrel Holland and Kevin Rayhill. Both have do great work for me.
Now I have seen a few rifle built by barrel makers that shot very well , two were 308's put together by Hart barrels , naturaly wearing a hart barrel and one was by Pac-Nor and it was a 7mmSTW.
I personaly like Hart barrels , never had any trouble with them and they have all shot great , also gos for Pac-Nor and the Pac-nor tubes ar a bit cheaper.
The Mike Rock Barrel with its 5R rifling is suposed to be the bets way to go but I don't have any experiance with them YET , but I do have one on the way.
Chris Mathews who is a board member is also held in very high reguard , especaily in building tactical style rifles.
THeir are a few other smiths on here but I haveen't heard a whole lot about any of them