Botttom line though is that as long as the metal is sound & there is no obstruction in the bore, it is virtually impossible to burst a bbl very much ahead of the chamber. Technically though, all things considered, the juncture of the chamber with the forcing cone is the weakest point in a shotgun bbl. Fortunately though max pressure has already begun to subside when this point is reached, so it is normally of no consequence.
Sums it up really .
Makes you wonder however why everyone is so precious about minimum wall thickness.
In reality the only issue I can see with thin barrels is the likelihood of damaging them.
As long as the chambers have not been lengthened and the chamber/forcing cone area is free from pitting what does it really matter if the bores have been honed out of proof?
We seldom talk of minimum chamber/end thickness,but would not that be more logical from a safety viewpoint?
Makes you wonder why guns are deemed out of proof with only 5 tho or so wall thickness removed.
GDU
