2-1/2" pitch?

[Bill Murphy]

Dean's method (against the wall in inches) is the American method and the most convenient. The English method is to measure the angle in degrees, a totally inconvenient method devised to excuse the stockmaker from blame if things don't come out right. The wall method changes a bit as the barrel length changes, but it is still a more convenient method.

[Theodore LeDurt]

Do you measure to the barrels from the wall at the muzzle, or do you measure from the wall to the center of the muzzle?

[Bill Murphy]

The edge of the barrels at the muzzle.