The 6.5 cm has had a distinct marketing advantage over the .260 for sure. Upon deciding to switch to 6.5, after burning out a 6mm Remington, the .260 was a no-brainer for me. I have infinite access to Hornady match .308 brass. I went with a Criterion barrel for the re-barrel and will never buy any other brand. My .260 has shot well with every single load that I put through it.
I recently loaded some 147 ELD-M and had zero trouble. It crunched a little powder, but so what. It shot them into 1/2 moa, at 2724 fps. I shoot 129 Hornadys at 3010 fps, also into 1/2 moa. If I had not had the brass, I would have probably bought a Creed, but I have seen zero advantage over the .260.
You cannot go wrong with either, but I like my .260. It has become my favorite rifle.
