I am really enjoying my 6.5-06. I use Hornady 140gr SST moly coated bullets, h4831SC, and CCI BR2 primers all in Lake city brass. I use a pretty hot load that will push the 140's to 2975fps out of a 24" barrel.
Not found a powder better then H4831SC for the 6.5 cal. Start at 54gr and work up. Use 52gr if not moly coated bullets.
You might also want to look at RE22 and 25. Might be what your rifle likes better.