I'm using a .270 Ackley as wellas a .26-06 Ackley as long range deer rifles - I'll bet the 6.5-06 Ackley would be a great one as well. As would the 6.5-284 and the .264 Win Mag.

My only issue with the 6.5MM guns is the lack of bullet selection. American bullet companies seem to overlook this caliber and put their eggs in the .270 basket. Yes there are a few good hunting bullets in .264; but I might grow old waiting for a Scirocco or Accubond to come out.