In this April's issue of NRA, American Rifleman, is a good tech article by Bryce M. Towsley on a shotgun comb and how it affects shooting. I thought it gave a good grasp of the part the comb plays in shotgun shooting.
Below is an excerpt from the article.
The article then goes into detail as to reworking the stock to obtain the proper comb fit for an individual.
Below is an excerpt from the article.
When shooting a shotgun, the shooter's eye is, in effect, the rear sight. If it is not lined up properly, you will not hit what you are shooting at. The comb is the top line of the shotgun's stock, and it's the part that supports the shooter's face and controls the position of the eye. If the comb is too high or too low, the gun will shoot high or low. If it's too much to the left or right, the gun will shoot left or right.
The article then goes into detail as to reworking the stock to obtain the proper comb fit for an individual.