Posted by Drew Hause on December 5, 2014, 12:01 pm, in reply to "Re: 10 gauge"
Recommended loads from Hunter Arms catalogs
PLEASE NOTE 3 dram load of black powder (1 1/8 oz. at 1200 fps) is about 4900 PSI. 3 dram Equivalent of SMOKELESS is about 9600 PSI. 4 drams of FFF (about 108 gr) with 1 1/8 oz. is about 7000 PSI.
From the 1928 edition of ”Smokeless Shotgun Powders” by Wallace Coxe and E.I. du Pont de Nemours & Co. reported the LUP pressure for 1 1/4 oz. 3 1/2 12g loads: DuPont Bulk smokeless powder - 11,700 psi Schultze Bulk smokeless powder - 11,800 psi 28 grains of Ballistite - 12,600 psi 40 grains of DuPont Oval Progressive Burning powder - 9,400 psi Note: First 3 pressures are beyond the modern SAAMI recommendation of 11,500 psi for 12g 2 3/4" and 3" shells. The SAAMI max. for 10g is 11,000 psi