More mumbo jumbo
1920s Hunter Arms Two-Trigger Gun Order
Standard stocks with a hard rubber buttplate were 14 1/4" LOP from the front trigger, 1 5/8" DAC, 2 3/4" DAH, with a positive/down pitch of about 2 1/2" for a 30" barrel gun

For us mumbling simpletons, pitch can be specified as the difference between LOP to heel and LOP to toe
Fred Gilbert (1865-1928) was one of the world’s best known shooters from 1895-1915 and used a L.C. Smith to win the DuPont World’s Pigeon Shooting Championship in 1895 and the “E.C.” Inanimate Target Championship Cup in 1896. The “Fred Gilbert Specifications” were for a drop at comb of 1 3/8 inches; at the heel, 2 inches;
length from trigger to heel, 14 1/4 inches; trigger to toe 14 1/2 inches; and trigger to center of butt 14 inches; with a full pistol grip and 30-inch full choke barrels.