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|  MIL-C-70724(AR)
APPENDIX C
70.3 Firing defects. Upon completion of firing, all
cartridge cases from the test ammunition shall be carefully
examined for firing defects. If any defect is found, a detailed
check of the equipment shall be made to determine whether the
ammunition or the equipment is at fault. If it is established
that a faulty weapon is responsible for the firing defect, then
the test shall be disregarded, the weapon shall be corrected or
replaced, and the tests shall be re-fired. If it cannot be
established that the weapon or other equipment is at fault, then
the stoppage shall be charged against the ammunition.
DEFINITIONS
80.0
80.1 Misfire. Failure of a cartridge to fire after
initiating action is taken. There are two general categories of
misfires:
The primer fails to fire when struck by the firing pin.
a.
b.
The propellant does not ignite when the primer fires
normally.
80.2 Perforated primer.
A perforated primer is one in
which the indent in the printer cup, made by the firing pin, is
entirely perforated. It-can be identified-by a visibie-hole
through the primer, or if the perforation is minute, by
discoloration of the indent caused by gas burning.
80.3 Primer leak. Discoloration caused by gas leakage
around the junction between the primer cup and the primer pocket
wall.
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.
80.5 Blown primer or a primer
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 deformed. A primer which falls
out of the primer pocket is in
the same category as a blown primer
but the distortion of the
primer pocket is less obvious.
C-7
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