6.5 Creedmoor fits a standard length SA mag box better.
On a different rifle, like an MRC, the 260 would be good.
Exactly. The Kimber already has a short mag box, and unless you cut the freebore to match the magazine (which will reduce case capacity and increase pressure), 260 would be a bad idea. It would almost be better to build a 260 kimber on the long action receiver...but in that case, why not go to 6.5x55, 6.5x284, or 6.5-06? It is my understanding the 6.5 Creedmoor was created to address the magazine issues the 260 has with high BC bullets. I do know I can't get any where near mag length with my Creedmoors.
This is the same reason my 84M is off becoming a 243 AI. I have too many 6.5 Creedmoors already and 260 won't cut it with that action.
