Wheelman, recall that the first step in developing really accurate ammunition for a given rifle is measuring chamber dimensions carefully.

As an example; the six match rifles RAFSU's long range team has. All the .308s are serial numbered sequentially. As are the 6.5x284's. All six of them have different chamber dimensions, specifically the distance from the bolt face to the beginning of the rifling. The ammunition that shoots best in one gun, may not even allow the bolt to be closed on the next "identical" rifle.