In a factory 10 twist barrel I wouldn't even really consider a .243 Win. With a factory 9.25 twist (Savage or Rem) shooting 105 Amax, well that's a different animal all together. Custom 7-8 barrel and I'd run it against anything the CM OR 7-08 has to offer at long range.
For what OP is shooting the 6.5 CM RAR Predator is a no-brainer. It's the only rifle twisted right to maximize his use of bullets available for the 6.5mm. Put a custom 8 twist tube on the Tikka's and it changes the dynamics of things greatly.
