The analysis of the perforation of the bullet 11 mm. on the metal sheet

Abstract

The bullet hole traces from both entrance and exit at the crime scene are important data which can be used in the investigation. Most of the analytical investigation will be mostly considerably on the physical appearance e.g. tear, traces of gunshot, the size of the entrance and exit bullet holes. The purpose of this research was to study the pattern and the difference of marks on the metal target caused by the collision of gunshots using 4 types labeled as A is Full Metal Jacketed (FMJ) 135 gr. of Thai Arms., B is Jacketed Hollow Point (JHP) 230 gr., C is Full Metal Jacketed (FMJ) 230 gr. and D is Lead Semi Wad Cutter (LSWC) 200 gr. all of Bullet Master, shot from a Colt Gold Cup 11 mm caliber at 7 different distances as 0.00, 0.15, 0.50, 1.00, 1.50, 2.00 and 2.50 meters to records a diameter of bullet hole. In this experiment, the shot at the close range could be seen most clearly physically. On the metal target, ring of the black gunshot residue around the collapse entrance of bullet holes and a tear at the exit of the bullet was appeared. The physical properties of bullet hole on the metal sheet of each bullet type are different that can basically inform about type of bullet (p < 0.05), at the 95% confidence level but the size of bullet hole can’t use for identity shooting distance.

AK bullet (7.62 × 39 mm) holes on 1‐mm sheet metal: A forensic‐related study in aid of bullet trajectory reconstruction

“…7.62 × 39 mm, AK rifles, bullet holes, bullet trajectory determinations, sheet metal, shooting reconstruction metal has been frequently considered with different ammunition combinations due to its frequent appearance in shooting incidents with bullet holes [2,3,[6][7][8][9][10][11][12]. These studies have described bullet hole characteristics on sheet metal surfaces in relation to bullet trajectory determination.…”