I am going to try to illustrate my experience with an exageration.
Imagine that your stock was cut or angled at a 45 degree angle from the heal to the toe (I know nobody would ever do that. if you mounted that gunstock it would point high in the air because the flat of the stock would be in your shoulder and that is at a severe angle. That is an exageration of what I found on a svererly pitched gun that I had and fixed. At 1st when I would mount it lots of rib visable due to the pitch, it is now the gun I shoot the best of my guns.
Jeff G.