Has anyone gone through the effort to figure out safe minimums at each point from the breech so that there is something more reliable than an overall minimum thickness number?
From DuPont Powders 1933.....
For the first 8-10 inches, most factory barrel wall thickness is 35-45 thou min............butchered with anything less, I'm not interested in shooting it..........
There are quite a few pressure charts out there, PeteM will probably be along shortly and post one for you.......these show how rapidly the pressure falls off in a shotgun after the first 8 inches or so........
