Mark,
Just to give you a barometer to go my and I am sure the 6/06 will be a speedier round due to the powder capacity. My 6AI shoots an 85 grain bullet right at 3400 fps - 22" Hart. Mine has a short action and a Wyatt box but 95 grain Bergers is it and heavier Berger or any 105's and I gotta seat them pretty deep or shoot them one at a time. One of the beauty's of shooting the long action is being able to use the 115's and if a guy has an 8 twist barrel that makes it even better.
6AI is a tweener. I really like mine although either a 6/06 or a 243 AI or any other mid bore wild cat would be right at home in my Heritage.
Too many rifles and not enough time.

Dave

Last edited by RaceTire; 02/27/11.