Have not actually checked it out so do not know if it is of any benefit or not.
I do recall though some years back reading one person's opinion to take the point where you forward hand gripped the gun in shooting & extend a line from there to the center of the butt plate/pad etc. For correct pitch make the butt plate perpendicular to that line.
This would quite obviously show a fat beavertail needing less pitch than a splinter & an O/U needing still less. As I said though I have not checked any of my guns to see how they "Pitched Up" to this standard, have always relied on the standing against the wall method or measurement.
