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|  MIL-C-70725A (AR)
80.2 Perforated primer. A perforated primer is one in
which the indent in the primer cup, made by the firing pin, is
entirely perforated. It can be identified by a visible hole
through the primer, or if the perforation be minute, by discolor-
ation of the indent caused by gas burning.
80. 3 Primer leak. Discoloration caused by gas leakage
around the junction between the primer cup a-rid the primer pocket
wall It is termed a large leak if the gas escapes around more
than 50 percent of the periphery of the primer cup; or a small
leak if the gas escapes around 50 percent or less of the
periphery.
80.4 Loose primer. Looseness, but not so as to permit the
fired primer to fall from the primer pocket after the cartridge
is fired without distortion to primer pocket.
80.5 Blown primer or a droppedprimer which falls out of
the primer pocket. A blown primer is a primer which, when the
cartridge is fired, is separated completely from the head of the
cartridge case, and both the head of the case and the pocket are
enlarged and deformeed. A dropped primer is in the same category
as a blown primer but the distortion to the primer pocket is less
obvious.
80.6 Ruptured body. A circumferential separation of the
case wall produced by firing. Ruptures are divided into two
categories, partial and complete. A partial rupture is one which
extends less than 360 degrees around the case; a complete rupture
is one which extends entirely around the case, separating the
case in two parts. Ruptures are designated according to
position, as indicated on Drawing 7643674.
80.7 Split body or case. longitudinal separation of the
metal in the case wall produced by firing. Splits shall be
classified as shown in the specification.
90.0 FIRING DEFECT DEFINITIONS
90.1 Bolt override base (BOB). During the feeding process
of the next cartridge, the bolt passes over the rim and pushes on
the body of the cartridge causing an angular feed which will jam
the weapon.
90.2 Close on empty chamber (COEC). The bolt fails to pick
up the next round and closes into position on the empty chamber.
C-8
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