Many good replies on this thread. 6 creedmoor is a good alternative to .243. I ended up building a .243 with a 1:8 twist. It shoots the heavies with high BCs and the lighter varmint loads .5 MOA. I chose the .243 because my kids hunt with .343 and I already had the dies and components...
Consider a 6.5 PRC. Or buy a Danaher in 308 and for about 400 extra buy a 6.5 creed barrel and tools.to swap. It only takes minutes. 2 calibers 1 rifle.