Hello, I recently purchased and Ithaca 37 turkey slayer, the new one. I have always had good luck with Rhino choke tubes, and wanted one for my new gun. I called up rhino to order one, They recommended a .670 for guns with Browning Invector plus threads. So I ordered it, but then found out that the bore diameter of the ithaca is .730 instead of brownings .742 even though they have the same choke threads. Do you think that this .670 isnt enough constriction to shoot number 5 or 6 longbeards this spring? I would like to know what you folks think before I shoot with the choke, and Rhino wont take it back. Yes I know their customer service is crap, but they make a good product in my eyes. Also a side note this gun does have a lengthened forcing cone. Thanks for reading.