Eric, unless you have a barrel maker make a custom barrel to the exact exterior profile of a particular original, you have to use off the shelf contours. These profiles usually fall within the general contours of a particular region or a particular maker. The makers give them names that generaly are meaningless. It is up to you the builder to make a decision of what barrel profile best fits your needs. Just because a barrel is marked that it is a Reading profile does not mean that it is correct for all Reading rifles. As you learned if you were in the Army, not all men are created equal, thus not all barrels.