End of Barrel Blown off

[B. Dudley]

How did he KNOW it was steel stuck together that caused it?
A little difficult of a situation to know what actually happened.
One could only speculate.

[Bill Murphy]

Yup, has anyone ever opened up a steel shot shell and found the shot rusted together? Did the victim examine the inside of his remaining shells? Junk in the muzzle would be my guess.

[Casey]

Originally Posted by Brian Dudley

How did he KNOW it w steel stuck together that caused it?
A little difficult of a situation to know what actually happened.
One could only speculate.

Sorry for the lack of clarity.
Unless one had been in the hull at the time of firing, riding the wad and shot column through the barrel, accompanied by a metallurgist with a VERY expensive camera, there's no way one could truly KNOW what happened.
I plead guilty to making an assumption and stating that shot appeared to be the culprit.

Additionally, he cut open some shells and found rust.
I inspected some new winchester shells that I have and (here's that word again) it appears that the melt job on some of the crimps goes clear through the plastic thus providing a path for moisture to reach the shot.

As far as the powder getting wet, the wad can form a fairly good seal. Perhaps it's possible to get the shot wet but not the powder.