Eccentric chokes are a method of moving the point of impact(POI) of your shotgun without having to alter the actual installation of the screw in choke system. In custom fixturing that we have here at Briley Mfg., we have the ability to bore a choke off center so as to alter the POI by as much as 8" in any direction. The tighter the constriction, the further the POI can be moved. Please forward your bbl to Briley Mfg. with detailed instructions on how far you wish the POI moved, in which direction, and at what distance this information is based upon.
Cost on an Eccentric choke is typically $125.
Call 713-932-6995 or email SMP@Briley.com should you need further information.