I have a Vortex PG4 kit in my .177 TX200. With 2 coils clipped it’s still making 12.5fpe with HN 8.62gr and is very accurate. Problem is that the shot cycle is still harsh with a distinct metallic “ping”. My other springers tuned to around 12fpe have a much more gentle shot cycle concluding in a nice solid thud. What do you think I should do to fix this without giving up any FPS? Uj