You guys know anything about this choke? I was looking for an SSX to go in my new 20 gauge and found this:
http://www.opticsplanet.net/primos-jelly-head-turkey-choke-tube-extra-long-extended-remington-12-gauge-643.html
643 is the order number for the REM. .665 jellyhead. I'm thinking they have the order or "part" number mixed up with the constriction.
The threads are at the top , I dont think its a standard REM choke pattern , looks more like a Mobil choke type pattern
The descriptive text below the photo says that the exit diameter is .665". Also in looking at Primos web page, I believe that Optic Planet has mistakenly posted a photo of a JH tube for a Benelli SBE II, not the Remington.
FC