Boom galloper Gun Case will set himself up for a leap in class if he continues on his winning way at Doomben on Saturday.

Trainer Liam Birchley is toying with the idea of starting Gun Case at Group Two level in The Shorts (1100m) at Randwick on September 20.

Gun Case will have just his fourth race start in the Pure Jali Handicap (1200m) following wins at Coffs Harbour and Doomben.

"After Saturday we should know exactly where we are going with Gun Case. He beat a small field at Doomben last time but it was on a very wet track," Birchley said.

"This time the track should be dry but we are up against some handy restricted-class sprinters such as Jefferson Park who has been running in open company."

Birchley has never hidden the fact he has a huge opinion of Gun Case but he is not locked into Sydney or Melbourne for the spring.

"We will just get over Saturday to start with. But all going well we will probably head south," he said.

"It really is a matter of getting out the Sydney and Melbourne racing calendars and looking for races which are suitable and he might get into with his prize money level.

"I suppose his immediate aim might be The Shorts."

Birchley believes Gun Case showed he was up to Sydney class at his first start when he was fifth behind subsequent Group One winner Cosmic Endeavour at Rosehill earlier this year.

"It was his first start, the track was wet and it was a good field," Birchley said.

Meanwhile, Birchley is keen to press on with plans to take another of his gallopers Time To Plunder for the greys' race series in Melbourne during the spring carnival.

Time To Plunder makes his return to racing in the Barry Nilsson Lawyers Open (1110m) at the Doomben meeting.