Well I tried Rockdoc's suggestion to measure the constriction in the choke with inside calipers. After measuring the barrel before the constriction and getting a consistent .615" diameter I then felt around for the narrowest portion of the choke itself. Topo barrel measured .607 and bottom .611 this gives me 4 points of choke in the bottom barrel and 8 points in the upper. Pretty typical for skeet and improved cylinder in a .20ga so perhaps someone did open these chokes before. Have to see the pattern board results for sure now. Ideally I would have liked a skeet lower and light modified upper. Still won't be surprised if the gun throws an IC and Mod pattern with modern shells. These gun were produced before plastic wads became prevalent.
