What do you think of the 6.5 and 6.8 on the 30 RAR case and 30 RAR platform?

30 RAR has 44 grains capacity and could be a good benchrest round in 308 but was also thinking in 6.5

The 30 RAR seems designed for 120 grain bullets so it makes me think why not use the 6.5 or 6.8 bullets that are better designed for that weight.

The 6.5 version I nicnamed the 6.5 Odin
The 6.8 I dubbed it the 6.8 Fenrir (The wolf who kills Odin)

the 6.5 has better long range traits but the 6.8 would be lower pressure due to the larger bore.

I'm not sure the 6.5 version would do better than the current offerings... I have no experience with any 6.8s.