Your reamer might be differnt than mine....call Kiff and have him fax or mail you a print of your reamer for your exact freebore.
Dave, my neck is 0.319 and the dia is 0.2844 on mine. As far as the 7 twist and the Berger combo....is should be okay but you might dust them at the top end velocities with that fast a twist.....1-9 would be better.