Dustin:

In the FWIW column here, having just cut 1 1/2 inch of barrel off of a circa 1927 M12 16 bore, it patterns quite nicely at 9 points of choke (which I'd have thought was slightly-tight IC) . During the process of getting to the end of the crack we were eliminating, it seemed like there was at least 3-inches of constriction going on in it's tube. Not sure what that means, except that I'm even-more impressed with the build quality of these older Winchesters. As far as a comparison, was also shooing my English 16 as well that day and it's right tube is choked IC (7-8 thousand) and the patterns (which were side by side) were comparable. Looking forward to using it on something other than a grease board soon, maybe the local pet & shoot?