I was shooting some trap a couple of weeks ago with another guy who also has a Red Label. After a 16 yd round we were discussing choke sizes. I always use my full choke tube when shooting trap but usually cant hit squat beyond the 22 yd. line using my Ruger. I switch to my trusty old Model 12 at longer yardages. He mentioned to me that his full choke was not as tight as my Winchester. I had never thought of this before. Ruger uses Briley chokes and I just figured that full was full. It's not. Using a dime as a measure, he checked my guns. The dime slipped into my full choke tube as well as his but not into my M12. Whats up. I know that some companies build their chokes differently but I would think that Briley would be as close to spec as any out there. By the way these chokes pattern beautifully. Also can anyone give me the measurements for each choke. Full, Modified, Improved cyl. and Skeet. 12 ga. of course.