Drew Hause
09-17-2014, 08:55 PM
I've been working on this
https://docs.google.com/a/damascusknowledge.com/document/d/1F2sQuPm05IE4VWYYnCkvuXmYEzQoWd_SQgaAfUOZEFU/edit
and reviewing old threads. I believe Bro. Bruce posted this c. 1900 hang tag several times, and it has been repeated that 12g guns were patterned with 1 1/8 oz. 3 Dram Eq.
Turns out that 40 grains of DuPont Bulk Smokeless is 3 1/4 Dram Eq.
http://pic20.picturetrail.com:80/VOL1373/6511424/24532497/410047689.jpg
For comparison, the 1933 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 Dram Eq. of DuPont bulk smokeless at 9,600 psi.
A 1963 George Herter Reloaders Handbook lists 23 grains (3 1/4 Eq.) of Infallible, now Unique Dense Smokeless, with 1 1/8 oz. shot in a paper case with paper wads (card & fiber) at 8,725 psi by LUP. By modern piezoelectric transducers that would be more like 9,500 psi.
https://docs.google.com/a/damascusknowledge.com/document/d/1F2sQuPm05IE4VWYYnCkvuXmYEzQoWd_SQgaAfUOZEFU/edit
and reviewing old threads. I believe Bro. Bruce posted this c. 1900 hang tag several times, and it has been repeated that 12g guns were patterned with 1 1/8 oz. 3 Dram Eq.
Turns out that 40 grains of DuPont Bulk Smokeless is 3 1/4 Dram Eq.
http://pic20.picturetrail.com:80/VOL1373/6511424/24532497/410047689.jpg
For comparison, the 1933 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 Dram Eq. of DuPont bulk smokeless at 9,600 psi.
A 1963 George Herter Reloaders Handbook lists 23 grains (3 1/4 Eq.) of Infallible, now Unique Dense Smokeless, with 1 1/8 oz. shot in a paper case with paper wads (card & fiber) at 8,725 psi by LUP. By modern piezoelectric transducers that would be more like 9,500 psi.