Despite all the imitators, Dunbar and Hilton, who call their service SCORE, have had the most luck with locks. Boston College, a 10-point favorite in '72, won 41-11, and SCORE claims in its ads that it also came up a winner on its next seven locks of the year. Rival handicappers point out that however its locks have done, SCORE has also had its share of losers. Regardless, when SCORE settled on Michigan over Washington in the Rose Bowl as this season's lock of the year, some bookmakers were sufficiently impressed to take the game off the board, and the Las Vegas line favoring Michigan briefly jumped from seven to 12 points before dropping back to eight. And since Michigan won, 23-6, the action figures to be even more torrid when next season's lock of the year is announced.