Best twist rate for a bolt action Grendel

[KentuckyBuddha]

Also, there may not be the penalty one might think with lighter pills. I got 1/9" twist in 20" for a bolt project, and I wish I had gone with 1/8". The fact is for far and away the most part I will probably be shooting 123 grain projectiles for the most part and for those it won't make one bit of difference at all between the two.