"Still, I need to concentrate on my breathing, and posture, and trigger control, and sight picture... quite a bit with each shot.I also bring along my .22lr to practice those basics while the barrel cools on my .30-'06."

You are doing it the right waytaking that .22 along with you. A .22 is also comes in very handy if one gets the flinches from shooting a high power.A few shots with a .22 and the flinches are gone.