I had some guests over for a dove shoot on the home place once, many years ago. I had previously loaded up some b.p. in Federal paper 12 ga. hulls, a full box. One of the guests had not brought any shells and asked to borrow some. I inadvertently handed him the box of the b.p. loaded ones. He was shooting an A5. They functioned pretty well, as I recall, maybe beginning to jam towards the last few in the box. The guy's Dad and I were longtime b.p. shooters, and laughed so hard, because his son never even noticed all the smoke from the shells! The old Browming had to have a thorough cleaning that evening.