Originally Posted By: Drew Hause
....Pressures at that point are probably < 1000 psi

1 1/8 oz at 1200 fps....

In this case though, would the pressure in the area have exceeded what was expected to be normal when the second shell was fired into the obstruction? Id also guess that if the wad only made it to the end of the forearm, it was probably just being pushed by the primer and there may have been a full charge of unburned powder between the wad and the following shell that was fired, if only the shot was emptied from the test hulls. Maybe.