The hang tags are very interesting. I don't think that the gun manufacturers actually honed the chokes out to have the guns reach a certain pellet count. I think the guns were choked to a certain set standard,then shot, and the pellet count reported.
If the gun didn't pattern to a set standard , then they might be tweaked until they did.
I think the practice of using terms such as full choke, I/C, and modified are unreliable at best. It is much more informative to say your gun is choked .035 then to say it's choked full. Wich could be anything from .020 to .040.
Pete
Pete