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“六四”式7.62mm手枪射击后会形成5种弹头痕迹和11种常见的弹壳痕迹。5种弹头的痕迹出现率和细微特征的稳定性各不相同,其中阳膛线、阴膛线的出现率最高,起末端痕和小线纹的稳定率最高。11种弹壳痕迹的出现率和稳定性也各不一样。分析弹头痕迹、弹壳痕迹的出现率、痕迹特征的稳定性以及差异形成原因,能帮助我们区分和认定有关枪支。
“June Fourth” 7.62mm pistol will form five kinds of warheads and 11 kinds of bullet marks. The five kinds of warheads have different trace appearances and subtle features. Among them, the positive ripple line and the female rifle line have the highest rates of occurrence, with the highest rates of end marks and small lines. The appearance and stability of 11 kinds of cartridge traces are also different. Analysis of the warhead marks, the appearance of the marks of the shells, the stability of the mark features and the causes of the differences can help us to distinguish and identify the firearms.