Not to take over for Todd and answer the question.. too much..
When looking down on the barrel in the stock, or the barrel channel... the thickness or edge of the forestock should taper or smoothly step down slightly.
What the Italians do is is have thicker wood under each band and then curve in, or bow the too thickness of the forestock in between each band. The appearance is, instad of tapered lines, a stretched out elongated "hour glass" look.
As an aside... the term "'swamped" which is borrowed from the world of American longrifles. To reduce the dead weight of heavy long barrels, the barrel makers usually tapered and flared the flats of the barrel to reduce weight, improve swing, and point and aim. The nickname for "tapered and flared" is "swamped" (even though technically, visually, the taper and flare is different than a general "scooping" out or "dishing" in).
In gleichem Schritt und Tritt, Curt Schmidt
Not a real Civil War reenactor, I only portray one on boards and fora.
I do not portray a Civil War soldier, I merely interpret one.