Lightly-raced gelding Dig Deep gave training partners Daniel and Ben Pearce their biggest success with his win in the Group 2 Amelia Park Karrakatta Plate at Ascot on Saturday.

A veteran of just two starts, Dig Deep ($19) was given a gun ride by Jarrad Noske and surged between runners in the straight to score an upset win.

Outsider Tinsnip ($81) looked the winner until Dig Deep surged and had to settle for second with Miss West Coast ($12) third.

A winner of a Bunbury maiden on debut, the son of Deep Field had worked home well for fourth in the Perth Stakes in the lead up to the Karrakatta after a slow start

Improving his manners had been a focus of Team Pearce since and those efforts paid off.

"We put a bit of work into thinking about how we were going to get the final touches on him and rectify the mistakes he made in the Perth Stakes," co-trainer Daniel Pearce said.

"We're obviously really happy with the result."

He said the Karrakatta win was the biggest in the pair's career and was a special moment for all connections.

"This is something we've dreamed of and since our partnership we've really wanted to get a feature race win. We've done it today."

Pearce said while the stable had confidence in the horse's talent, his lack of experience was a concern.

"We knew he had a lot of ability but I would have liked to have seen him have another couple of starts in his first prep and come here a little bit more furnished but we got the job done."

Favourite Jericho Missile was under pressure a long way from home and weakened in the straight to finish tenth, almost five lengths from the winner.