This has been referenced many times, so I found the original for posterity. Sorry about the format

Sherman Bells pressure testing published in The Double Gun Journal Summer 2002 "Finding Out for Myself, Part VI, Smokeless vs Black", p.19, and summarized in Volume 17: Issue 4, Winter 2006, p. 39


1 1/4 oz. 3 3/4 dram GOEX FFFg Black Powder at 1240 fps and equivalent load Blue Dot
.........................1 inch.................6 inches...............12 inches
BP.......................5900 psi...............4100....................2100
Blue Dot................6000....................4300....................2300

1 1/2 oz. at 1236 fps Blue Dot (weight not stated)
.........................10,000.................4,400...................2000


And the oft cited DuPont mid-1930s pressure curve




Last edited by Drew Hause; 08/30/12 11:31 AM.
https://sites.google.com/a/damascusknowledge.com/www/home