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|  MIL-C-70725A (AR)
3.4.6 Function and casualty. The cartridge shall function
without casualty within the temperature range of -20 to 50C in
the M16A1 and M16A2 rifles equipped with the M2 training bolt.
The cartridge shall safely function (no critical firing defects)
within the temperature range of -55C to 68C.
3.4.6.1 Cyclic rate. The cartridge shall function in the
M16A1 and M16A2 rifles equipped with the M2 training bolt at an
average cyclic rate between 550 and 920 rounds per minute within
the temperature range of -20C to 50C.
3.4.6.2 Noise level. The noise level of the cartridges
shall be greater than 100 decibels when the noise level of ball
cartridges fired under identical conditions is between 120 and
130 decibels. The noise level of the cartridges at the gunner's
ear position shall not exceed 164 decibels.
3.4.6.3 Breech flash. Firing the cartridges shall not
cause breech flash which would endanger the shooter.
3.4.6.4 Hot chamber effects. A cartridge inserted into the
chamber immediately following the firing of 120 cartridges shall
not fire (cook off). In addition, the cartridge shall not deform
to the extent that clearing of the weapon is made difficult
following the proper waiting period.
3.4.6.5 Chemical compatiblitiy. The cartridge shall be
safe to store and fire (no critical defects as defined by Table
IV) when subjected to the lubricants and solvents listed below.
The reliability of the cartridge shall not degrade by more than
0.10 after exposure to the following substances (see 6.8.2):
Specification
Material
MIL-C-372
Bore Cleaner (RBC)
O-I-503
Insect Repellant
P-D-680
Dry-cleaning Solvent (SD-1)
W-L-800
Lubricating Oil (PL-S)
MIL-L-2104
Lubricating Oil (ICE, T)
MIL-L-14107
Lubricating Oil (LAW)
MIL-L-46000
Lubricating Oil (LSA)
MIL-L-46167
Lubricating Oil (ICE, A)
MIL-L-63460
Lubricant (CLP)
7
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