MIL-C-50543 (MU)
(Major Defect)
e.
Any primer misfires.
f. (1) Thirty (30) or more cartridge cases cannot be ejected from
the launcher by spring operation of the extractor. (Major Defect)
(2) One (1) or more cartridge cases cannot be ejected from the
launcher by hand operation of the extractor. (Major Defect)
g. Any projectile sticks in gun bore or fails to attain 60 percent
of the mean uncorrected velocity of the lot sample. (A projectile on which
a velocity reading was not obtained due to low velocity, shall be con-
sidered as a failure. (Critical Defect)
h. Four (4) or more primers show any evidence of gas leakage (smoke
deposit or discoloration of base plug or cartridge case base). (Major Defect)
(Critical Defect )
i.
Any metal part separation occurs prior to impact.
If the launcher is suspected of being the cause of rejection for the mean
velocity and standard deviation phase, sufficient cartridges from a con-
trolled lot shall be fired from the same approved launcher. If there is
significant difference in the standard deviation and mean velocity of the
control lot from that previously obtained for control rounds, then a new
approved launcher shall be obtained and the lot of ammunition retested. If
all cartridges function properly on original test, then only the velocity
will be considered on a retest. If there is no significant difference in
the standard deviation or mean velocity of the control lot, then the lot
shall be rejected.
4.3.3.15.2 Initial production test plan, (informational test only)
Code No. 27002.-Beginning with the first lot produced by each producer and
continuing until that producer has submitted three (3) acceptable lots
that are accepted in accordance with Paragraph 4.3.3.15, an extra. sample
of ninety (90) rounds shall be selected from each lot and pre-conditioned
and tested as follows:
a. The ninety (90) rounds shall be packaged in their regular shipping
containers and subjected to transportation vibration environment in accord-
ance with MIL-STD-331, Test No. 104.
b. After transportation vibration, the rounds shall be unpacked and
subjected to the JAN temperature and humidity cycle (14 days) specified in
MIL-STD-331, Test No. 105.
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