Lefever catalogs of the day stated their chokes were a taper from breech to muzzle. So far I have failed to examine a Lefever so bored. Lefevers I have been able to check which were believed to have original chokes were "Taper" choked in that they had no parallel section following the choke so were tapered to the muzzle. However the taper started about 4" back of the muzzle on full choke guns with a lesser length on guns with less than full. It may well be that all bbls were choked with the same reamer, it simply being run farther out the bbl as constriction was reduced.
