The incident occurred at Yandoit, north-west of Ballarat, on October 31.

Melbourne's Armed Crime Taskforce has been extensively door-knocking the area and ran an information caravan this week.

Detective Acting Sergeant Andrew Brady said the van had generated positive information.

"A number of locals have come forward, people who possess little parts of the jigsaw puzzle,'' he said.

Police have described the victim as a recluse, who had lived at the High St property for 10 years.

The shooting occurred about 6am, when he was home by himself and heard a car horn in the driveway.

He walked five metres from his caravan and was shot in his right leg at close range.

He lay there for up to two hours, drifting in and out of consciousness, before dragging himself to his caravan to call Triple-0.

At the scene yesterday, Det Acting Sgt Brady said that although police had no suspects, they would keep investigating until they found what they needed.

He said people had reported hearing a car and a gunshot that morning.

"We're keeping an open mind and following several lines of inquiry," he said.

Det Acting Sgt Brady said the man was permanently disabled after receiving "horrific injuries" from the single gunshot wound, which struck near a joint.

He said the man was physically unable to return to the property and was having rehabilitation.

"The offender was not known to him and he hasn't been able to help us greatly due to his condition," he said.

He renewed the call for information, saying someone must have heard a gunshot or seen a car speeding away.

"At that time, early in the morning in the country, people could be walking the dog, going for a run, farming ... a noise like a gunshot would carry far," he said.

A neighbour, who declined to be named, said he had little to do with the man and heard nothing that day.

"It's put a bad name on what is a good community," he said.

Anyone with information can call Crime Stoppers on 1800 333 000.