The 'ol boys used some boomer loads
DuPont Trophy Oct 24 & 25 1895
http://www.la84foundation.org/Sports.../SL2606012.pdf
Capt. John L. Brewer was using a Greener gun of high grade. His shells were the U.M.C. Trap, 3 1/4 inches long,
4 Drams of DuPont (Bulk) powder by measure; one trap wad, two pink felts, 1/4 inch 11-gauge wad and one ordinary 12-gauge pink edge wad over the powder and 1 1/4 ounces of No. 7 chilled shot; the shell had a very hard square crimp.
From “Smokeless Shotgun Powders: Their Development, Composition and Ballistic Characteristics” by Wallace H Coxe; E.I. du Pont de Nemours & Co., 1927 pressures for
1 1/4 oz. 3 3/4 Dr. Eq.
Ballistite maximum pressure at 1” was 4.9 Long Tons = 15,344 psi by Burrard's conversion
Schultze at 1 3/4” was 4.5 Long Tons = 14,000 psi
DuPont Bulk at 1 2/3” was 4.1 Long Tons = 12,656 psi
All well above SAAMI recommended max. pressure
More information
https://docs.google.com/document/d/1...UOZEFU/preview