I shoot a 6.5-06 AI that Kirby Allen made for me. It has a Lilja barrel with a 1:9 twist. What Kirby found in testing the rifle, was the fact that it simply did not like the J-4 jacketed bullets (Berger & Wildcat Bullets). I shot some of the 142 gr. SMK's & 140 gr. Hornady A-Max, but groups were not as tight as I liked.
I then switched over to the 130 gr. Nosler AB. The initial powder I used was H1000. Good groups, but I wanted more. I then tried H4831 sc. Groups tightened up a little more. Pet load as of right now is 56.2 gr. of H4831 sc. Gives me 3,115 fps from a 26" tube and .5 MOA.
Good Luck!