Not so sorry. Pedersoli put their most weight on around the hips! From the breech and about 7" forward.The only generalization I'm making is that shotgun barrels were thinner before choke tubes. It is an overgeneralization, but not that far from reality. I gave some examples of meat and potatoes guns that anybody could buy. Before choke tubes, these had barrels as thin as choke tubes are today. Absolutely, there are some thick barrels out there from pre-choke tubes, especially when you are talking the off gauges like 16 gauge. For 12 gauge though, the majority were too thin to have normal choke tubes installed. Some of them could, but I wouldn't call it the majority by any means. That's why Pedersoli made their barrels thicker. It wasn't for any safety reason, it was so they could thread them for choke tubes.
The early ones almost look parallel and narrow at the breech. The later ones are much wider at the breech so it could be argued it was done for, in your words " safety ". My words would be " lawyer proof"!