Barrel wall thickness

[Drew Hause]

Sherman Bell's pressure test 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

[Bill Murphy]

I'm a little surprised about the 10,000 figure, but 1 1/2 ounces is not a friendly load in a 12 gauge at that velocity anyhow.