You need to measure them with a bore gauge to determine the actual choke. Choke is the difference between the nominal bore size and the constriction of the bore at the muzzles(s). For a 12 gauge GH Parker steel barrels the bore will likely be .730" +/- and a full choke constriction around .035". A cheap blade type choke gauge will give you a estimate but only the bore gauge will be an exact measurement. BTW, your gun was made with Damascus steel barrels in 1899. The first Parker Special Steel barrels appeared on GH gun in 1908.
|
Threaded Mode