ORIGINAL: eldeguello
You are right, but at first, BRI DID NOT STATE that they had to be used in a rifled bore-quite the contrary, actually!
Many people on this forum don'teven know what BRI is, only the Old Timers.

I have been shooting them since 1980 and still havesome boxes on the shelf.
Never have shot one out of a smooth barrel. Mossberg 500Rifled, Moss 835 rifled andBRN A-5 withHastings Paradox.