Neither vulnerable at matchpoints, I dealt and passed. My left hand opponent bid one heart and partner overcalled two clubs. I put her on six of the suit, and after right hand opponent raised to three hearts (showing a limit raise with 4 card support), I competed to five clubs and bought the contract (doubled) with the following: ♠ 6532 ♡ T ♢872 ♣ Q9842.
We went down two doubled (-300) and saved a 420 game. Partner felt that I should have made this sacrifice only with favorable vulnerability (opponents only vulnerable). I was taught to make it even at equal vulnerability (-300 versus -420 or -500 versus -620), avoiding this only at unfavorable (-500 versus -420).
Partner's fear was that we might go down three. Also, she is an older person who was weaned on Goren. But would modern experts sacrifice with what I had?