State v. Clark, 196 P. 360 (Or. 1921)

The defendant objected to the witness testifying about his experiments, the test bullets being entered into evidence, and elarged photographs taken showing the marks on the bullet recovered from the victim's gun, the defendant's gun, and the test bullets. The court held the photographs and testimony were adimissible because they helped show that, based on the markings on the bullets, the victim did not shoot himself accidentally with his own gun and that the bullet fired came from defendants gun. Further, the test bullets showed that the breechblock had no materially changed since the shooting in question.