Are the barrels twist steel? I ask only because I know of one gun (w/twist barrels) that had a dent ironed out and later burst at that point. I don't know how severe the dent was, how long it was shot with the dent and may have been further damaged, how the dent was ironed out, or even if there was a connection. But after that, if looking at an original for a shooter, I'd check any former dents closely.