If I was doing it , it would be the 5.5 single six with the 22wmr conversion.
22lr comes out subsonic with short barrels not desirable unless your using a suppressor.
MY pref for center fire is the 4.75-4.5 barrels I think they balance better and are faster pointing.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent