You do it your way and I will do it my way .I think we can only argee to disagree on this one . I dont think I will persuade you to my way of thinking and you certainly wont change my mind.
Prehaps we should both start a new post on the subject? Then we can argue till the cows come home.

The whole top and bottom of the original question ,was, was the Greener made as a 2&3/4 or as a 3"? we have gone off topic and for that I appologise. We have not answered the question and I'm not sure if the chambers were ever accuratly measued ,by what ever means .Whilst it is possible that the gun was made as a 3" ,it would almost certainly be a heavy action, but without a close examination every thing wuold be a guess . Greeners might have some record of the original spec but short of paying for a search ,I doubt there will ever be a definative answer.