No injury at all. It took someone else to point out what had happened just before he fired another shot. There was a slight chip out of the forend and the split starts just where the forend stops. The split does look straight as though along a seam but barrels are not made in that way. I wonder if there was a flaw in the steel that was the weak link for it to burst in that way but why did it not fail at the proof firing stage when a two charges at around 70% higher than normal were used? It was the Proof report that indicated the thickness at 22 thou at the point it failed. The barrels now reside in a local gunshop as a warning to check barrels for obstruction. That is the first time I have ever seen anything like that happen. Lagopus.....