MIL-C-46396A(MU)
b. Observation at 100 yard position.- The observer, with line of
sight established perpendicular to the trajectory by the light or visible
marker, shall note the trace performance of the bullet from each sample car-
tridge. A trace which is visible prior to 100 yards range shall be considered
acceptable. The cartridge shall be considered defective when the bullet
exhibits no trace.
c. Observation at the 1500 yard position.- The observer, with line
of sight established perpendicular to the trajectory by the light or visible
marker, shall note the trace performance of the bullet from each sample cart-
ridge. A visible trace extending to 1500 yards range or beyond shall be con-
sidered acceptable. The cartridge shall be considered defective if the bullet
exhibits no trace.
4.4.7 Impact sensitivity.- The test shall be conducted in accordance with
the methods and procedures of the accuracy test in AMCR 700-700, Vol. III,
using the equipment listed for the impact sensitivity test in IEL-8594735.
4.4.8 Velocity.- The test shall be conducted in accordance with AMCR
700-700, Vol. III.
4.4.9 Chamber pressure.- The test shall be conducted in accordance with
AMCR 700-700, Vol. III.
4.4.10 Function and casualty.- The test shall be conducted in accordance
with AMCR 700-700, Vol. III. Two rifles shall be used and 100 cartridges
shall be fired in each.
4.4.11 Airtightness of base closure seal.- The bullets shall be placed
base up under approximately 1.5 inch head of freshly boiled water in a vacuum
jar test unit, The desiccator or jar shall be evacuated to a pressure of
2 pounds per square inch (4 inches of mercury) below atmospheric pressure and
held at that pressure for not less than 5 seconds. The number of bubbles
liberated from each bullet shall be observed.
4.4.12 Defect penalty.- In any ballistic test, except function and
casualty, in which the occurrence of a firing defects prevents the obtaining
of a reliable result for the characteristic being tested, an additional shot
shall be fired, That particular test shall not be penalized, but the accept-
ance sample shall be penalized for such defects in accordance with Table III.
However, if a misfire occurs in the waterproof test and examination reveals
that the cause of the failure was moisture in the primer or propellant, the
velocity of the cartridge shall be counted as 873 ft/sec (one-half of the
specified average velocity) and the recorded velocity of the additional shot
shall be disregarded in determining the average recorded "wet" velocity.
If, however, the examination discloses that the failure was caused by other
than submersion, the failure shall be penalized in accordance with Table 111.
In the latter event, the velocity of the additional shot shall be included
in the computation of the average "wet" velocity.
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