After talking to the smith who built the 6.5-06 for me and a few other friends/smiths they mostly agreed that if you take the angle of the shoulder draw intersecting lines forward of the shoulder and where those lines intersect is the hottest point of the powder burn sequence. If that point is in the throat area it will induce more wear. If it is in the neck of the case the case itself will take the brunt of the heat. Brass is cheaper than barrels.
