Dwayne Dunn has put himself back in contention for the Melbourne jockeys' premiership with a timely winner at Flemington.

Dunn is in a battle with Damien Oliver and Craig Williams but was three behind that pair at the beginning of Wednesday's Flemington meeting.

Victory aboard Rationality in the racing.com Handicap was Dunn's first metropolitan success since May 23.

With Oliver and Williams both heading to England for the Royal Ascot meeting next week, Dunn will get the opportunity to peg back them back at Ballarat and Moonee Valley.

Oliver and Williams are both on 47 winners for the season.

Dunn, who won the inaugural Spring Racing premiership during last year's carnival, said a metropolitan jockeys' premiership would look good on his CV.

"You can see how much it means by how much the other two want it," Dunn said.

"They've won plenty between them but they still want another one.

"Until you win one you probably don't appreciate what it means to you."

Dunn said his major supporters - Hawkes Racing - did not have a lot of "bullets in the gun" at the moment.

"Team Hawkes are my main supporters but if opportunities arise I'll ride for anyone," he said.

"It's great to be this competitive this late in the season."

A double to Darren Weir consolidated his position at the top of the trainers' premiership after a lean spell.

Weir had saddled just three metropolitan winners following Master Of Art's Caulfield win on May 2 but bounced back with three winners at the past two meetings to take his tally to 66, four ahead of Peter Moody.

Moody had a great May and after winning with Got You Double at Flemington was within two winners of Weir.

Weir, who won last year's premiership, responded with La Passe and Red Corner.

"You don't train for premierships but it doesn't hurt your CV," he said.

"You just try and win as many races as you can but sometimes you have a month or two where you don't go quite as well.

"The overall season has been great. It's just the last month that hasn't been, and you have to wait for the wheel to turn a bit."