I am looking at a JP barrel in 6.5 CM and they still show 22" 260 barrels and bolts in stock. I also have 3 Lilja barrels. I just bought 2 308 barrels in the AR10740 contour 20" and they are not very heavy (2.56#). Shoots well also. Their 24" heavy barrel is 4.25#.
I would consider another of those except they don't offer the Creedmoor. But not to say I wouldn't buy a JP either.
I would suggest having these guys turn yours down. You can also have it fluted, threaded, finished, etc. I have no connection with them except as a satisfied customer.