I guess if you get a squib in a machinegun, it depends on the gun. I don't think an open bolt subgun would have enough energy to cycle and fire another round. I don't know about a rifle caliber. It would be a very expensive experiment.
The explosion of the gun was caused by a squib load. A squib load is when a fired projectile does not have enough energy to leave the barrel therefore becoming lodged in the barrel. A catastrophic failure of the weapon is very likely when anot