MIL-PRF-71167 Cartridge, 7.62Mm: Short Range Training Ammunition Ball - M973 Cartridge, 7.62Mm: Short Range Training Ammunition Tracer - M974This specification describes the performance requirements and verification methods for the Cartridge, 7.62MM: plastic ball, practice M973, and the Cartridge, 7.62MM: plastic tracer, practice M974. These rounds are commonly referred to as Short Range Training Ammunition \(SRTA\). For the rest of this document both rounds will be referenced as SRTA and each single round by its model number. All requirements in this specification apply to both M973 and M974 rounds, unless otherwise noted that they are specific to the M974 round \(see 6.1\).

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MIL-PRF-71167A(AR)

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 XM973 shall

comply with the following Hazard Classification when packaged in

line with the packaging requirements specified in the contract:

DOD Hazard Class/Div:

1.4

DOD Hazard Compatibility Group:

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.

3.6.3 Toxic fumes. The toxic fumes produced by the

cartridge shall not exceed those produced by firing similar

quantities of 7.62mm, M80 Ball 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.

3.6.5 Residual stress. The cartridge shall not split when

subjected to residual stress for the applicable materials.

3.7 Environmental requirements. Each cartridge shall

operate without evidence of cracking, distortion, or damage that

may impair its intended operation or loss of performance, under

the following environmental conditions.