Please update as you go along, My gun is the exact same story as yours, bought a used 2018 22Hp, and it did not group at all when I received it. After cleaning and getting used to it it’s better, but not great yet. Only difference is mine seems about 10 fts faster than your readings.
I will do a better deep clean on mine, as I think it helped but not there yet, or even a polish may help.
Good luck.