Atticus has perfect aim?

Scout and Jem were outside as always when somethin happened, a dog appeared. I didn't know if it was dangerous or friendly and i didn't wanna risk Scout or Jem. I told them to go inside the house. Atticus decided he was gonna shoot that dog. It was amazing he got em' on the first try! I was happy to know Scout and Jem would not be harmed at all.