ORIGINAL: el deguello
I remember well when the 12-ga. BRI "dumbbell" shaped sabot slugs first became available around 1972. The makers claimed they could be shot from a smoothbore, as the rear "fins" would make them fly point-forward.
BRI ( Ballistic Research Institute) wasin California back in the 60's. They did all their testing with Mosberg 500's. I have a 60's Shooters Bible that has thehistory and all of BRI'sresearch.I started shooting BRI'sin Rifled Barrels when they werefirst placed on the shelves. In the 70's Winchester bought them out.