Caulfield Guineas winner Shooting To Win will miss the Doncaster Mile to be reserved for a weight-for-age target at the end of the Sydney autumn carnival.

Trainer Peter Snowden said he wasn't confident Shooting To Win would be at his best for the $3 million race after coming out of the George Ryder Stakes with a minor back complaint.

At his first weight-for-age test, Shooting To Win loomed at the 200m in the George Ryder before finishing fifth to Real Impact.

"He pulled up with some muscle spasms after his run the other day," Snowden said.

Shooting To Win will now be aimed at the Group One All Aged Stakes at Randwick on April 18.

"It will give me a bit more time to get him right and have him one hundred per cent rather than go into a Doncaster at eighty-five per cent which isn't good enough," Snowden said.

Shooting To Win emerged as one of Australia's most valuable stallion prospects with his Caulfield Guineas win over Rich Enuff and subsequent Australian Guineas winner Wandjina.

Snowden, meanwhile, says he is tempted to give Wednesday's Warwick Farm winner Courtza King his chance to run in a support race during The Championships.

"I'll see how he pulls up but I am thinking about setting the goalposts pretty high for him next start," Snowden said.

"There's a Listed race (the South Pacific Classic) coming up at Randwick which I have been looking at."