At the scene, behind the Pa Klongcheep shooting range, police found Wisoot Ponsane, aged 46, with a bullet wound to his head.
Police said that from their investigations so far, they believe Mr Wisoot was out hunting with his friends Nares Klintrai, 32, and Jaras Raksasang, 36.
Police do not believe Mr Wisoot accidentally shot himself, so are continuing their investigation to find out what happened. The guns of Mr Nares and Mr Jaras have been taken to the police station to check for gun shot residue.
Mr Wisoot was carrying a .22 caliber gun, with Mr Nares walking behind him. There was a gunshot sound, and Mr Wisoot fell down to the ground.
His two companions telephoned for help but due to the remote location, Mr Wisoot died before he could get to hospital.
His body was taken to Thalang Hospital for an autopsy.