Armor Piercing Ammunition Standards PDF Download

Special bullets, both caliber .30 and .50, of standard A.P. dimensions with sintered carbide cores, were investigated in firings against face-hardened and homogeneous armor plate at normal and oblique impact. Against face-hardened plate at normal impact, the carbide bullets showed far greater penetrating ability for a given energy than the corresponding standard A.P. bullets; while at obliquities the penetrating ability of the carbide bullets relative to that at normal deteriorated more rapidly than that of the standard, the carbide bullets, however, still maintaining an absolute degree of diminishing superiority up to about 30 degrees. (Author).