I can't edit the previous post, but suspect there is a translation issue.
"our barrels, made of Swedish steel, will hold a charge of 14.25 grams of powder, and a shot load of 400 grams. Barrels made of special steel will hold a charge of 23.75 grams of powder and 860 grams of shot load."
14.25 grams = 7.33 Drams black powder
400 grams of shot = 14.1 oz. (40 grams = 1.4 oz.)
23.75 grams = 12.2 Drams of black powder
860 grams of shot = 30.3 oz. (86 grams = 3 oz.)
If I interpret correctly, this is testing made on steel samples, not proof of finished barrels
Another post long ago stated that Husqvarna proved in house at pressures essentially that of today's CIP standards.
