I'm re barreling a rifle strictly for distance, with new 150 + gr bullets Sierra , Berger, maybe Hammer, bullets I was thinking of going with a 7 twist 6.5x284, Yes a 7.5 twist would be better maybe, but I have a Shilen on order as I have sometime before building starts I could mak some changes, any thoughts please be free, Discussion is on 6.5-.264 BULLET only verses twist. Thank You