I'm not sure what your sight picture looks like to you. Does the gun shoot high? Are you shooting at 10 yards, 25 yards? Do 158 grain slugs shoot to a different POI than 130 grain?

There are a lot of variables in POA/POI and you may have to change one thing about your sight picture at a time until you hit where you want. I agree you may want a known good shooter to try your gun before any grinding takes place!

Short barrel revolvers take much time and practice to master especially shooting D/A. But the effort is well worth it and will improve your shooting skills immensely with all types of handguns.

Don't give up and start grinding just yet, seek out those you trust and take a class with that specific snub-gun. Good luck and enjoy!!