NCJ Number
73255
Journal
Journal of Forensic Sciences Volume: 25 Issue: 4 Dated: (October 1980) Pages: 786-795
Date Published
1980
Length
10 pages
Annotation
Jacketed sporting rifle bullets can be classified and in many instances identified by the use of a 12-parameter classification system.
Abstract
This system allows the examiner to either estimate or positively identify the bullet's manufacturer, as well as its weight, design, and often the specific cartridge in which it was loaded. This information can then be used to locate the vendor and purchaser of the reloading component or factory-loaded ammunition. Many models of weapons can be eliminated because they are not chambered for the identified cartridge. The examiner can also duplicate or approximate the leading in the laboratory to obtain the best examplars for testing purposes. The 12 parameters used in the system are identification number, manufacturer, weight, diameter, cartridge, base design, length of bearing surface, color, shape, location and description of crimping cannelure and of other cannelures, and miscellaneous features. Bullets to be examined must first be cleaned and prepared. Identification of bullet origin is determined mainly by type of metal and metal plating. Most of the bullets manufactured in the United States are made of brass-colored metal, and most silver-colored bullets are of foreign origin. The 12-parameter system has been used to locate possible offenders by examining records of weapon and ammunition sales. Tables, photographs, and one reference are included.