6 Creed twist rate?

I use a Gain Twist, 8.4 to 7.7, as an example the RPR is 7.7 so going to straight 1-7 should be okay ...

If you are under 24" a 1-7 is about perfect, over 24", you can do 7.5, 7.7, which every you have access too. But I don't see a 7 hurting you any