Powder pressure curves Archived Message Posted by Drew Hause on November 29, 2014, 7:52 am, in reply to "Re: 20 in 12 Pressure" This is a pressure/time curve courtesy of Neil Winston www.claytargettesting.com Pressure/distance curve from "Smokeless Shotgun Powders: Their Development, Composition and Ballistic Characteristics" by Wallace H Coxe; E.I. du Pont de Nemours & Co., 1933. Validated by Sherman Bell "Finding Out for Myself, Part VI, Smokeless vs Black", in The Double Gun Journal - Summer 2002, p.19 DuPont Oval was the first progressive burning powder developed for the 1922 introduction of Western Cartridge Company’s 12g 'Super-X Field' 2 3/4” 1 1/4 oz. 3 3/4 Dram Equiv. shell and the 3” 'Record' with 1 3/8 oz. of shot. DuPont MX became PB, so neither of the smokeless powders are rapid burning. Message Thread: 20 in 12 Pressure - Marcus Merritt November 27, 2014, 11:01 am Re: 20 in 12 Pressure - Drew Hause November 27, 2014, 11:34 am Re: 20 in 12 Pressure - Marcus Merritt November 27, 2014, 2:33 pm Re: 20 in 12 Pressure - Tom Martin November 27, 2014, 4:48 pm Re: 20 in 12 Pressure - Marcus Merritt November 28, 2014, 6:48 am Re: 20 in 12 Pressure - Doug November 28, 2014, 12:50 pm Re: 20 in 12 Pressure - Drew Hause November 28, 2014, 1:02 pm Re: 20 in 12 Pressure - Marcus Merritt November 28, 2014, 10:03 pm Powder pressure curves - Drew Hause November 29, 2014, 7:52 am Re: Powder pressure curves - Drew Hause November 29, 2014, 9:38 am Re: Powder pressure curves - Marcus Merritt December 2, 2014, 5:58 am Re: Powder pressure curves - david October 7, 2017, 9:37 pm Re: Powder pressure curves - Drew Hause October 8, 2017, 8:48 am   Searching