Ruger convertible six for a single action revolver that will shoot Lr and Magnum.
CZ Kadet either the stand alone Kadet or the conversion kit for the CZ 75/85 pistols.
Used... a High Standard. One made in Ct after about 1960 (some of the earlier ones don't like HV ammo). These will have triggers that spoil you for other rim fire pistols. All steel, very accurate. Prices from $325-900.