t4man, Over time I had two of the 3" guns like yours. They are unique among S&Ws. No other S&W used the firing pins, limit pins and extractor of the 547 revolvers.
My guns produced surprisingly good ballistics with various types of ammo. The undoubtedly very expensive extractor, worked perfectly. No sticky extraction or other issues even with 9MM NATO, +P, +P+ factory ammo, and equivalent reloads. Even standard pressure 9MM exceeded the ballistics of any major manufacturer 38 Spcl. +P I chronographed.
In short, very interesting, collectable, and dependable revolvers. Wish I'd kept at least one of mine.....