I've got an Army Jaeger 'Kentucky' lookalike. It must have started life as a rifled specimen and was later bored out to smooth (ish). When you drop a bore light down the barrel there are still faint traces of rifling although it was bought in auction as a 'shotgun'. What makes it different from the Pedersoli repros is that the barrel is 36' long (Pedersoli are generally 32") and it is held in with 3 wedges as opposed to pins. Also the patchbox is quite different.
It keyholes at 25 metres with a .450 ball and 010 patch, which is as far as I have ever tried it out.

By the way, CVA, Traditions, Ardesa all did 'Kentucky' kits in the 70's, I still have the majority of one that was bought from Major Noel Corrie of Steeple Bumpstead. The police later seized the barrel as it was deemed to be sold as a wall-hanger but was in fact a Part 1 firearms, un-proofed! Those were the days....