Painter, of Birchmore, Brookside, Telford, hit ebay diamond seller Jason Holbrook in the face before fleeing from the victim's home in Stirchley with diamonds and drugs.
Shrewsbury Crown Court was told today that Mr Holbrook was left with a pellet lodged behind his nasal cavity. The court heard that before the
February 27 attack, Painter used to visit Mr Holbrook's home to smoke cannabis.
But on the day of the attack, Painter produced the weapon and fired shots.
Painter admitted wounding with intent and possession of a firearm with intent to cause fear of violence at an earlier hearing.
Mr Paul Smith, for Painter, said his client was now remorseful and horrified by his behaviour.
The judge also ordered a verdict of not guilty to a robbery charge which Painter had denied.