Test firing of rimmed and rimless rifle cartridges from single barrel breech loading unusual/ unrifled/homemade firearm

Test firing from unusual/unrifled/homemade firearm plays very important role in Forensic Ballistics. Single or double barrel breech loading countrymade firearms can be prepared. Unrifled firearms are imitation model of standard weapon. These firearms are manufacturing in some places of India. All country made/homemade/desi-katta/handgun designed to chambered appropriate diameter of cartridges. The body diameter of cartridge is smaller than the breech end diameter of barrel. Headspace of barrel is greater than the body diameter of cartridge, but rim diameter of rimmed cartridge always greater. If there is difference then, test firing problem arises. The Ballistics expert regularly test firing carried out. Test firing of each firearms were performed in the firing gallery. For test firing branded firing stand was employed. After test firing, test fired bullets recovered from firing box containing treated cotton. In this study, single barrel breech loading (SBBL) homemade handgun concerned. The headspace of barrel exactly chambered 8 mm rifle cartridge. Investigating Officer sent unrifled single barrel breech loading homemade firearm and 7.62 mm rimless long rifle cartridges. Test firing was performed by providing cotton thread at the cannular of 7.62 mm rifle cartridge.