Have had a choke epiphany recently with a 1906 damascus barrel OE 16g Smith with barrels cut from 30" to 29". Hunter Arms 16g chokes were about 1 1/2" and indeed the choke constriction is now slightly less than 1/2"; .005" right and .010" left and patterns a nice IC and Mod. How can that be? smile
On my 6th case of RST 3/4 oz. at 1100 fps skeet loads.