RE: Mossberg 500 blows up!
my model 500 has handled slugs without fail. the manuel states slugs are alright and i believe even recommends a modified choke to pattern. i would have to think it was a abnormality with ammo or gun or both. unlucky things happen, ive seen super solid actions and barrels rupture, when its thier time its time.
i dont think its a mossberg flaw in general