I have a 4" 63-3; a wonderful gun. Generally they aren't considered as accurate as the K22s, but I sometimes wonder if that can't be attributed at least partially to the fact that small guns are just more difficult to shoot accurately.

Mine has a great trigger in both SA and DA. I bought target grips for mine and that helps a great deal, since the magnas they come with are tiny and add to the difficulty mentioned above.

They are good guns to teach others to shoot with, particularly ladies and children; i.e. people with smail hands. I use mine to review fundamentals of defensive shooting; it is like shooting my carry gun, which is also small. After a session with the 63, I practice again with the carry gun.

Hope some of this is helpful to you.
Andy