I was wondering if you guys that have been reporting super accurate groups using the Hornady brass have a tight chamber and are turning the cases. (?) I was also wondering if I should go with an 8 twist or 8.5 twist barrel to best handle the Berger 130 and 140 grain VLD bullets. My donor rifle, and forementioned brass and bullets are ordered already, and now I need to choose a chamber and figure out the other specs so I can get going on the barrel. Any input is appreciated.