A man is in a critical condition after he was shot during a hunting trip in the NSW Central Tablelands.

The 70-year-old man was shot on a rural property on Campbells River Road in Black Springs, about 20km south of Oberon.

Paramedics treated the man for a gunshot wound to his right shoulder. He was airlifted to Westmead Hospital in a critical condition.

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Police have been told that the man and his son, aged 47, were securing their guns on the back of a ute when a round discharged from the 47-year-old's gun.

They had been hunting game on the property.

An investigation is underway.