Good article on tv last night watching GUNS AND AMMO as I mentioned in another post

Per the article the 260 Remington had won out two years ago--for several reasons, one being Hornady was the only manufacturer..so if that factory went down, that's it for supply..however the 6.5 CM has become so popular and manufactured now by so many different companies that this is no longer a concern..

Apparently the 6CM was also being considered, however barrel life was significantly less than the 6.5..so the 6.5CM got the nod...in with the new, out with the .308