I just cleaned and installed the .20 barrel into my Airforce EscapeSS. It was a little bit more challenging doing an SS because of the barrel being recessed about 6 inches into the shroud but with the help of a wooden dowel I got it in okey. That was one of my concerns also I was a little worried about loading the small pellets. I test fired the gun with one pellet and I had no problems loading it and the gun shot fine, in fact it was whisper quit all I could hear was the trigger and the pellet hitting my backstop. I had it turn all the way down because I was concerned it could have valve lock and dump all the air but with the 12-inch barrel that was not an issue. Now I have to put on a scope and unfortunately the only scope I have available is only 12x so the next thing I need to buy is another 16x scope because with these old eyes I think I will be challenged to shoot at 50 yards with a 12x. I don't know, guess I will find out. Anyways so far so good and I am pleased at this point that I have a .20 to shoot again. When I was first starting out years ago that was my favorite caliber because of the Sheridan Blue Streak I had. Hopefully I will get to sight it in tomorrow before it gets too hot. The Sheridan is still in the family, my stepson loved it, so I gave it to him a couple of years ago. We have never had any issues with it, and it still shoots great.