I am getting confused. Twist is usually thought of as being a "quick" twist for heavy bullets, for example. Years ago the 223 came with a 1-14 for 55 gr bullets. Then people tried 69 gr bullets and went with a 1-9 twist. Now they use 80 grs and use 1-7 twist. If you went to a 90-100 gr bullet you would need a quicker twist say 1-6.5. Correct me if I am wrong.
I have always thought the standard twist to be fine unless you want to shoot heavier than standard bullets. I have never heard that "overstabilization is a problem". If you shoot lightly constructed varmint bullets with a fast twist barrel they may come apart from the higher rpm's however.

I like to do my hunting BEFORE I pull the trigger!
There is only one kind of dead, but there are many different kinds of wounded.