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为掌握射击弹头、弹壳痕迹的变化规律以指导侦查破案,对六四式手枪整个射击寿命内的全部射击弹头、弹壳进行取样,通过对样本的观察、分析,对各痕迹特征的形成、影响因素、稳定性及变化规律进行了研究。研究表明,坡膛痕迹具有较好的阶段稳定性,同期射击弹头间具备同一认定条件;但特征前后变化较大,仅在1000发内具备认定条件。
In order to grasp the variation of the marks of the projectile and the ammunition shell in order to guide the detection and detection of the incident, all the projectiles and bullets in the 4/4 pistol were sampled during the whole shooting life. Through the observation and analysis of the samples, , Stability and change rule were studied. The study shows that the slope marks have good stage stability and the same conditions are met between the shooters and warheads during the same period. However, the characteristics of the warheads vary greatly before and after the test, and the conditions are met only within 1000 rounds.