70.0 OPERATIONAL NOTES
70.1 Stoppages. In the event of excessive stoppages during
firing of the test, a detailed check shall be made to determine
whether the ammunition or the equipment is at fault. If the
stoppages were caused by misfires, the check of the weapon shall
include measurement of the firing-pin protrusion and firing-pin
indent. To assist in determining whether ammunition or equipment
is responsible for a stoppage, it is good practice to test the
weapon in question using ammunition of known characteristics, and
to test the ammunition in question by firing in another weapon of
the same type. If it is established that some fault condition of
the weapon is responsible for the stoppage, then the test shall be
disregarded, the weapon shall be corrected or replaced and the
If it cannot be established that the
tests shall be re-fired.
weapon or other equipment is at fault, then the stoppage shall be
charged against the ammunition.
70.2 Misfires. If excessive misfires are encountered, the
weapons shall be examined carefully to determine if the cause is
attributable to the gun. In any ballistic acceptance test where a
misfire occurs, a second attempt to fire the primer is not made.
It is mandatory that a period of at least fifteen (15) minutes
elapse after the misfire occurs before the action of the weapon is
opened. The misfired cartridge is carefully removed in accordance
with existing safety regulations, and preserved for further
examination. All handling and examinations of misfired
cartridges shall be conducted with due regard for the hazards
involved. The weapon in which excessive misfires occur shall be
thoroughly checked; it shall be disassembled and all component
parts critically scrutinized. Results of such examinations shall
be included on the test report as a matter of information.
70.2.1 Examination. Laboratory examination of the misfired
cartridges shall be made to determine the specific cause. The
result of the investigation is to be included on the test report.