Riddell has bounced back and returned to the winners list in the Gisborne and District Cricket Association Jensen Shield.
After losing their first game of the season in the previous round, the bombers were too strong for Romsey on Saturday.
The Bombers batted first and made 8-207 from its 40 overs.
Harry Johnson top scored with 54 off 47 balls.
After getting off to the perfect start with the ball, the Bombers were able to bowl Romsey out for 115.
Jarryd Barclay took 3-9 off two overs for the Bombers.
The win ensures that Riddell will finish on top of the ladder with one round remaining.
Romsey remains in second spot and will play finals along with Rupertswood.
Despite a loss to Rupertswood on Saturday, Hanging Rock is all but assured of playing finals.
On Saturday, Rupo made 192 as it was bowled out on the final ball.
Mitchell Wearne took 4-30 for the Heelers.
The Heelers finished 8-156 in reply.
Leonard Vincent top scored with 42.
The Heelers are six points and massive quotient ahead of Gisborne with one match remaining.
The Heelers will finish their season against Romsey.
Elsewhere on Saturday, Malmsbury lost to Gisborne.
Malmsbury’s 7-137 fell well short of the Dragons’ 5-190.
Trentham had a big wn against Blackwood.
Blackwood was bowled out for just 73.
Trentham needed just nine overs to get the runs, finishing 1-76 in reply.
Sunbury United had a final over win against Wallan and Woodend cruised to victory against Macedon.
