My late hunting partner had a SxS .410 that I tried to get him to let me rifle the full choke on the left barrel. Nadda.
I thought it would make a neat little .410" deer rifle/grouse gun, using BP and grooved lubricated 200gr. bullets. It was chambered 3", so the cases would hold enough powder for the job.
I merely brought this up to perhaps give someone an idea.