Doc06;
I do not have that article, however the American Rifleman ran an article on shotgun powders, back in the 50's I believe, which was also printed in a handloaders guide they once put out (Copyright 1969). In this article they ran the pressure curves for the first 10" of travel for 4 of the tested powders of this data. These were 3fg black, DuPont bulk Smokeless, DuPont Oval & DuPont MX, both dense smokeless. I believe that Coxe also included DuPont Ballistite in his test but it was not included in the Rifleman article. I have scanned in these 4 curves & e-mailed them to someone here on the board sometime ago & they have been posted. Perhaps whoever it was still has them & will see this & put them up again. If not see if you can PM me your e-mail address & I will send them to you. I am not currently set up to post pictures. All loads were in 12ga for a 3 dram or equivelent powder charge with 1¼oz shot.
