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MIL-C-70784 (AR)
4.5.2
Uniformity of charge. Once the propellant charge has
been established, a loading\charge machine shall be selected which
has shown the best uniformity in charge weight during a production
only one loading machine shall be used in the loading of the
run.
reference cartridges.
Every thirty (30) minutes during the
machine loading of the lot of reference cartridges, five (5)
sample cartridges shall be taken from the machine and the
propellant weight measured to the nearest 0.1 gram.
Charge
weight shall be maintained within 0.1 gram of the established
charge weight.
4.5.3 Loading control. A quantity of 10 rounds shall be
fired for pressure and velocity for each two hours of an eight
hour shift to establish velocity and pressure values, and check
the charge weight and uniformity of charge weight every hour.
Once established, the charge weight shall remain constant
throughout loading.
PACKAGING.
5.
5.1  Packing, level A.
Ammunition shall be packed in
accordance with Dwg. 12013674.
5.2  Marking.
Marking on the packed container shall be in
accordance with MIL-STD-129, Dwg.  12013674, and CFR Title 49, as
applicable.
6.
NOTES
6.1
Intended use.
The cartridges covered by this
specification are intended for use as reference cartridges for
calibration  purposes in 25mm cartridge acceptance testing.
6.2
Acquisition
requirements.
See MIL-A-48078.
6.3  Computations.
Standard deviation. Where computation of
a sample standard deviation is specified for determination of lot
acceptance, the method of computation will be:
S=
Where: X; = each individual value
X = sample arithmetic mean
n = sample size
16

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