AOA gave me 2 seals one a little bit smaller, his thought was see what happens. My FPS dropped down to 630 from around 680. I did use the krytox grease. It is shooting OK out to 30yds, but I had the jerks today. It never got over a hundred today so not sure what is going to happen. I decided to take the moderator off to shot it. If things don't go well with this seal, I'll try the other one. Now that I've taken it a part, it is only about a 15 min job. The picture is about 30 shots at 15 yds. This evening. and a rabbit head shot at 35 yds.