Second round got jammed inside barrel?? And also blew the second round shooting cavity in the cylinder??
He
believes that when the 2nd round was fired the bullet traveled down the cylinder chamber and because, he
believes, the cylinder was misaligned and the front edge of the lead bullet caught the edge of the barrel, forcing the lead to turn sideways, jamming the mouth of the barrel. The resulting overpressure blew the cylinder into three segments, one of which struck the son of the man who was shooting the gun in the stomach. The segment struck him on its flat side, instead of an edge, and neither his shirt or his skin were penetrated. It just stung like a strong hand slap.
I say believes because he didn't know for sure and that was the only idea he could think of. When he told me the rounds had filled the casing only 20% I suspected an overpressure caused by too rapid conflagration. I have only his word that the first round was not a squib, and I have only his suspicion that the cylinder didn't align properly before the hammer fell, which I find difficult to believe since he says the man was merely squeezing the trigger and the double action would properly align the cylinder.
I had other business and couldn't stand around and ask questions, but I plan to talk with him later and fill in some details.