There is a book set available in paper or CD from Jim Owens (jarheadtop.com or 334-347-0020) that includes a group analysis chapter. There are pictures of a group on target, a description of where the group hit, the mistakes made by the shooter, and the corrections needed.
As an example one group is identified as 11:00 to center. The pic shows the group extending from the 10 ring out and up to the 6 ring at 11:00. He identifies 3 problems: A) Lack of follow through, B) Anticipating recoil, C) Pulls rifle to rear, lowers shoulder to right & raises muzzle to left.
The corrections are: A) Good stock weld, B) Let head ride with recoil, C) Wait for rifle to push shoulder & move with it, D) Concentration; should be centered on sight alignment & trigger control! E) Ignore recoil.