I did the same also but after stalling out just below the gold rank in competitions, I tried a home made sight that eventually took me from twelve bull's eyes out of thirty shots up to eighteen bulls out of thirty at ten meters. It is a simple piece of plastic with a hole that hugs the barrel and then I trim the width so that when I look at the target there is just a small gap between the two "ghost sights" and trim the height until I start hitting in the upper half of the bullseye.