MIL-C-46396A(MU)
4.4 Test methods and procedures.
4.4.1 Bullet extraction.- The cartridges shall be tested in an approved
bullet extractor machine. The rate of travel of the test head shall be-riot
less than three nor more than six inches per minute.
4.4.2 Drop sensitivity.- Each cartridge of the test sample shall be
dropped from a height of 50 feet through a one inch nominal diameter.tube in
such-a tier that the tip of the bullet shall strike normal on a flat rigid
steel plate.
4.4.3 Residual stress (Mercurous Nitrate).- The test shall be conducted
in accordance with AMCR 700-700, Vol. 111.
4.4.4 Waterproof.- The cartridges (not exceeding five at a the) shall
be placed horizontally under a 2 to 2½ inch head of freshly boiled water in a
glass container and the container shall be evacuated to a pressure of 7½
pounds per square inch (15 inches of mercury) below atmospheric pressure and
held at that pressure for 30 seconds. The number of bubbles liberated from
the mouth or primer or both of each cartridge, shall be observed.
4.4.5 Accuracy.- The test shall be conducted in accordance with AMCR
700-700, Vol. III.
4.4.6 Trace.- The test shall be conducted in accordance with the methods
and procedures of AMCR 700-700$ Vol. III, and the following: Observation for
trace performance shall be conducted on a range of at least 1500 yards length.
All trace testing shall be performed at night. Observation for trace perform-
ante shall be made at the weapon and at points 100 yards and 1500 yards beyond
the muzzle of the gun on a line parallel-to and approximately 75 yards from the
plane of the trajectory. Lights or other suitable visible markers shall be
placed opposite the 100 and 1500 yard observing points to insure a line of
sight from each point perpendicular to the plane of the trajectory. The ammuni-
tion shall not be conditioned to temperature but shall be fired under existing
conditions. Three cartridges shall be fired to sight, warm and foul each
weapon prior to the test. The sample cartridges shall be fired in regular
sequence permitting sufficient time between shots for each observer to record
trace characteristics at each observation point. Each cartridge shall be
considered as a defective once only in the event it fails at more than one
observation point. Observations for trace performance shall be as follows:
a. Observation at weapon position.- The observer at this point
shall observe for any abnormal behavior as an informational check only. Record
shall be made of erratic flight, bursting bullets, muzzle flash of obviously
greater intensity than that produced by other bullets in the sample or such
other behavior as may be considered abnormal by the observer.
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