MIL-PRF-71168A(AR)
without casualty when fired at ambient temperature and within the
temperature range from -20°C ± 1°C to 40°C ± 1°C in the M60 and
M240B machine guns. The cartridge shall not cause any safety
problem to the operator or result in critical defect as defined
in Table VI when fired within the temperature range from -55°C ±
1°C to 68°C ± 1°C.
3.6.2 Safety. The cartridge shall not create any hazards
that would adversely impact upon the health, safety, and
performance of the user/operator. The hazards include misfires,
delayed ignition, cook-off, cartridge case stuck inside chamber,
projectile lodged in-bore, excessive low or high muzzle velocity
and ruptured cartridge cases. The contractor shall submit the
Material Safety Data Sheet (MSDS). The cartridge components
shall be lead free.
3.6.2.1 Final Hazard Classification. The XM974 shall comply
with the following Hazard Classification when packaged in
accordance with the packaging requirement specified in the
contract.
DOD Hazard Class/Div:
1.4
DOD Hazard Compatibility Group:
S
DOT Hazard Class:
1.4S
3.6.2.2 Energetic material qualification. The energetic
material shall be qualified by the Army Service Qualification
Authority, see 6.10.
3.6.2.3 Energetic materials compatibility. All energetic
materials (explosives, propellants, pyrotechnics) utilized must
be compatible with all combinations of directly contacting
energetic and non-energetic materials. In addition,
they must be compatible with all combinations of materials that
have the potential for contact in the system's life cycle.
3.6.2.4 Propellant stability. All propellants shall be
stable over a minimum time period of 5 years.
3.6.2.5 Pyrotechnic sensitivity. All pyrotechnic materials
shall be insensitive to initiation during routine shipping,
handling and storage.
3.6.3 Toxic fumes. The toxic fumes produced by the
cartridge shall not exceed those produced by firing similar
quantities of 7.62mm, M62 Tracer ammunition. Personnel shall not
be exposed to heavy metal levels in excess of the most stringent
limits established by the Occupational Safety and Health
Administration (OSHA).
3.6.4 Ammunition lot identification.
Ammunition lot
identification shall be assigned.
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