Finglas man Patrick McCann, who is in his 40s and has no involvement in the feud, received pellet injuries when a gunman opened fire as he chatted to a pal in Avila Park, Finglas, at around 7pm on Friday.
Mr McCann was transferred to Connolly Hospital in Blanchardstown but his condition is not understood to be life threatening.
The incident unfolded after two men on a motorbike approached the victim and his friend and fired at them from the bike.
It is understood that bullets from the shotgun ricocheted off a wall and hit Mr McCann in the face.
It is just the latest instalment in a bitter Traveller feud that has been rumbling on for over two years and has led to a number of innocent people being wrongly targeted.
Last week, the Herald revealed how a 15-year-old boy suffered serious stab wounds after four men broke into his Blanchardstown home looking to attack another person.The teenager was on his own when the gang, who were wearing balaclavas, stabbed him up to five times.
It is understood he suffered injuries to his leg, back and stomach during the frenzied attack which happened almost a week before Friday night's gun attack in Finglas.
Last March, the same feud worsened after a pipe bomb attack close to the scene of a daylight riot.
At least two people were hospitalised and three men arrested when two groups of feuding Travellers became involved in a pitched battle.
A vehicle was attacked after it crashed into a wall. Sources say that a gang used spades, hurls, sticks and axes to attack the car and its driver, who required hospital treatment.
The riot was linked to the dispute that has seen a number of arson attacks, including an incident in the summer of 2011 in which a house was completely destroyed.
Two petrol bombs and a number of shots were fired at the Avila Garden home.
There have been more than a dozen pipe bomb incidents linked to the feud, as well as at least two shootings.
The feud has led to a number of families being forced to flee their homes to locations in Co Meath and Co Westmeath.