It all depends on what you want to do with it . Most of the PRS guys run 6mm guns (.243,6 Creedmoor, 6x47 and so forth ).
I had PCR build me a 6.5 Creedmoor last year. No need to reload for the Creedmoor unless you just want to. Mine shoots the Hornady 140 A-Max's factory loads under 1/2 inch .