dead shot

plural dead shots

1. An unerring marksman.

   "He's a hard nail, is Jack, and a dead shot, too, but you can't leave a Grand National winner to die like that - what?"

   1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC

   1 more example

   “Forgot to tell you the other day that besides playing the Jew’s Harp, Atticus Finch was the deadest shot in Maycomb County in his time.” “Dead shot…” echoed Jem.

   1960 July 11, Harper Lee, To Kill a Mockingbird, Philadelphia, Pa.; New York, N.Y.: J[oshua] B[allinger] Lippincott Company, →OCLC