It’s probably been mentioned but since you have a .243 a .308 makes sense because you can use either case for both rifles with little effort….
I like my .308’s and the Creed would be superfluous for my purposes. I tend towards practicality in such matters, worst case scenarios. Each of my main hunting rifles have little brothers ie my 35 Whelen has my 30-06, my .338wm has my 7mm mag, my .308 has the .243. 😁