I have no personal experience with this caliber, but I was just going through the P.O. Ackley book for information on another caliber when I saw this post. The 6.5/06 Ackley Improved has the following loads shown.
120gr bullet, 55gr IMR4350 at 3275fps
140gr bullet, 53gr IMR4350 at 3095fps
140gr bullet, 55gr IMR4831 at 3065fps
150gr bullet, 51gr IMR4350 at 2915fps
150gr bullet, 53gr IMR4831 at 2915fps
165gr bullet, 48gr IMR4350 at 2600fps
165gr bullet, 50gr IMR4831 at 2650fps