The S & W 14-3 with this guy I've seen too many problems combined.
Externally : rear sight crooked, screw stripped of the viewfinder, slightly barrel curling up, this very serious..in fact it shoots up.
Internally : the point of release of the single action tampered with or worn out, pushing with your finger on the hammer fall down excessive cylinder shake, damaged firing pin, hand worn bud causing a wrong time.
The hammer in double action falls into the exact moment that the ratchet clicks of the niche, a little risky ...
I advised him to leave alone and buy something new.
Good save only the frame, cylinder and grips.
Than to use it safely recommend to change the hammer because of the nock point and worn out, his hand for the right time. Is better a magiorate hand, maybe even to fill the wear of the star rotation?
Excuse me for my bad english