Accession Number : AD0869282

Title :   Product Improvement Test of Cartridges, 5.56-mm, Assembled with Steel Cartridge Cases

Descriptive Note : Final rept. 14 Oct 1969-11 Feb 1970

Corporate Author : ARMY INFANTRY BOARD FORT BENNING GA

Personal Author(s) : Regan, Larry J. ; Kuczinski, Michael L.

PDF Url : AD0869282

Report Date : MAR 1970

Pagination or Media Count : 74

Abstract : The purpose of the test was to determine suitability of the 5.56-mm steel-cased cartridges to replace standard brass-cased cartridges, and to determine the physical and technical characteristics of the 5.56-mm steel-cased cartridges. Specific test phases to which the steel-cased cartridges were subjected were physical characteristics, safety, cartridge-weapon compatibility, adverse conditions (60-day open storage period), reliability, and human factors. There were no deficiencies and one shortcoming found: the susceptibility of the test cartridges to rust. There were 47 incidents of split cases out of 21,642 steel-cased rounds fired. However, these split cases did not adversely affect the operation of the weapons. There were 71 malfunctions with weapons firing control cartridges and 53 malfunctions with weapons firing test cartridges. All malfunctions, with the exception of three, were either weapon- or magazine- caused. The blast, flash, noise, and felt recoil produced by the test cartridges were comparable to those of the control cartridges. The test cartridges ejected farther to the rear and right than did the control cartridges. It was concluded that the steel-cased 5.56-mm cartridges are compatible with the M16A1 rifle and are suitable for US Army use under intermediate climatic conditions.

Descriptors :   *SMALL ARMS AMMUNITION, *CARTRIDGE CASES, PERFORMANCE(ENGINEERING), FAILURE, HUMAN FACTORS ENGINEERING, RUPTURE, STEEL, CORROSION RESISTANCE, OXIDATION, SAFETY, ENVIRONMENTAL TESTS, EJECTION, SUBSTITUTES, NOISE, RIFLES, BLAST, ACCEPTABILITY, RECOIL MECHANISMS, PROPELLANT FLASH, AUTOMATIC WEAPONS, TRACER AMMUNITION, BRASS

Subject Categories : Ammunition and Explosives
      Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE