(http://i1131.photobucket.com/albums/m560/mallardmachete007/LostPost_zps368ad5b6.jpg) (http://s1131.photobucket.com/user/mallardmachete007/media/LostPost_zps368ad5b6.jpg.html)
Sorry about the small print in the screen capture above. My computer froze up when I tried to post, and I couldn't get Copy / Paste to work. I had to use Alt / Print Screen to keep from retyping all of that.
(http://i1131.photobucket.com/albums/m560/mallardmachete007/RhinoChoke3_zps2ff7155d.jpg) (http://s1131.photobucket.com/user/mallardmachete007/media/RhinoChoke3_zps2ff7155d.jpg.html)
This was just an FYI thread for those that are fans of the Rhino chokes. Many people have tried the .660 chokes; (especially in the Remington guns) and now it appears that it's simple to oder a .670 choke on their website for pretty much any gun; if you can't get them on the phone.
Just somelpful information; in case you didn't already know. A .670 may outperform a .660 in some guns, using some loads.