As a victim of a K through post-grad education in the great State of Missouri, this works for me
http://www.omahamarian.org/trap/shotshellenergy.html
35 ft/lbs is more than 1 3/8 oz. 3 3/4 Dr. Eq. (1295 fps) in an 8# gun at 32.6 ft/lbs
And BTW: my aforementioned 2 3/8" chambered 20g had a crack in the wrist that required repair