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.