just go with a one in 8 twist....9's can be borderline with some of the longer heavier bullets...

I have found that what was told to me by the Sierra Techs is pretty much true.... their match bullets are the most accurate in the 2800 to 2950 fps MV range....

can't tell ya about Scenars as I haven't shot those...

you want a professional opinion on 6.5s... the man to ask is ScenarShooter...