Having a number of 7mm-08 and 6.5 creedmoor, i don't think there is enough difference to warrant a change from what you already ordered. The creedmoor may not be excellent at doing any one thing, but it does pretty well at a lot of things. Due to it's popularity it would be a lot better SHF round than a 7mm-08, 6 BR, or some of the more obscure rounds just because the popularity makes brass easier to find. Granted if you had the need, you can always make your own brass from other cartridges, but who would do that in a time of scarce resources? If it was me and i already had a 308, and had to pick something other than a 6.5 Creedmoor i would probably go with a .243 or 6mm Creedmoor.