Putting the gun against a wall and all that mumbo jumbo of so many inches away is pretty much a useless way of measuring pitch.

Pitch is the amount of degrees off 90 that the butt sits in relation to the sighting plane. The easiest way to measure is to put the gun upside down on a flat surface (with sight bead off edge) and measure the angle that the butt is at.

More accurately would be to use a device specifically designed for measuring stocks which will mount right to the rib of the gun.

B.Dudley