Belfast High can look forward to a fourth round trip to Bangor Grammar after this dominant performance in the replay following Saturday’s 17-17 draw.
Belfast High came from 17-5 down at the weekend to earn this chance with a last move of the game try but it was a different story at Shore Road yesterday.
High School coach Mickey Rainey knew his side could play much better than they did last Saturday.
“Our forwards were excellent in the first half, depriving Dungannon of possession,” said Rainey.
“They didn't really use the wind whereas Joel McBride kicked well into the corners when our turn came.
“You wouldn't have thought it was the same team that was so fortunate to come away from Dungannon with a draw.”
A break by Adam White set up the first try when he drew the full-back to send out-half McBride down the blindside to touch down.
White than added the second beside the posts for Robbie Reid to goal to make it a 12-0 interval lead.
With the strong wind to their advantage, High School dictated the pattern of play in the second period.
Right winger Matt Connolly added the third followed by White's second. Connolly also grabbed a second before Reid struck with a penalty.
Sub Darren Scott went in for the sixth, the best of the game.