The Shaw Things didn't have it entirely their own way at Stradbroke, though in the end winning by 27 points.
Had the Snowdogs kicked straighter, this one would have been closer.
James Langford was adjudged best, with premiership players James Dalbosco and Stinger Stanley again prominent.
Next week, a trip to Camberwell and a clash with second-placed Old Scotch.
Old Xaverians 6.1-37 8.4-52 10.8-68 13.11-89
St Bernards 1.5-11 4.8-32 6.11-47 8.14-62
Goal Kickers: T. Simmons 2, B. Scala 2, H. Vanderkley 2, S. Turner, J. Dalbosco, J. Hewitt, L. Soccio, J. Troiani, L. Agnoletto, B. Kennedy
Best Players: J. Langford., T. Hart, J. Dalbosco, J. Troiani, S. Stanley