Ending more than a 10-year relationship, Bettye McCartt has parted company with her former Metropolitan Talent Agency associate Chris Barrett and joined the Artists Agency.McCartt, who acknowledged that Barrett asked her to leave MTA last Friday, takes with her clients Wilford Brimley and Brian Austin Green and TV executive producers Chas. Floyd Johnson (“Quantum Leap”) and Chris Abbott (“Magnum P.I.”). McCartt said she expects other clients to follow, but she declined to identify them at this time. The press-shy agent was reluctant to discuss the reasons for the parting other than to admit it was “not too friendly” and to say, “It didn’t work out. I think Chris wants to do his own thing and I’m going to let him do that.” Barrett, who last month relinquished his partnership with Jeffrey Benson and Richard Weston, said yesterday, “I was unable to make her (McCartt) happy although I tried and I’m sorry to see a longterm relationship come to an end. I hope she has a successful tenure at her next position because I wish her the best.” Barrett and McCartt’s business relationship goes back to 1982 when they were partnered in McCartt Oreck Barrett and then later merged in what become MTA. McCartt had been a partner in MTA until she was bought out in September 1992 and had remained at the agency since that time. She had planned on staying with Barrett but the two reportedly ever consummated a deal.