DCD-C-63980(AR)
NOTES
FOR
PARAGRAPH
4.4.2.1
&
4.4.2.3
Visual standards/machine masters established and approved by
1/
the Government as defined in 6.4, shall be used in evaluating
cartridge case and cartridge visual defects. Major components
shall have previously been accepted in accordance with the
acceptance criteria defined in toe specification listed in the
applicable drawing.
Inspection verification of prior 100% inspections shall be
2/
performed per (a) by utilization of Government approved
machine masters or (b) MIL-STD-105, AQL = 0.25, to determine
size minimum sample size = 315, zero defects allowed.
sample
If a chamber gage is used, the maximum force to insert the
3/
cartridge into the gage shall comply with either of the
following criteria:
Apply
a
static
force
of
not
to
exceed
270
Newtons.
a.
b.
Apply a dynamic force by hand (no
mechanical
aid)
which
does not damage the cartridge.
4/
The
lot shall not be penalized during
inspection
verification
for
oversize conditions provided that:
3600 a n d ,
The
crimp
is
visually
complete
for
a.
b.
A sample quantity of the discrepant cartridges in
accordance with Table II meet the projectile extraction
requirement of 3.4
A cartridge weighing less than the value determined by the
5/
formula specified in 6.8 shall be rejected. The 100%
inspection method may be by verification of weight of each
cartridge or by probe for a fixed minimum propellant height in
If the probe method is used, the
a charged cartridge case.
followinq method shall be used to establish the minimum height:
a.
Establish
the
mean
charge
weight
in
accordance
with
4.5.12.
Charge a minimum of 25 cases to the specified weight,
b.
measure each case and calculate the mean propellant height.
Repeat step b with a propellant charge weight 1
gram
less
c.
less than the established mean charge weight.
Adjust the probe height such that any cartridge in which
d.
the propellant charge is 1 gram below the mean weight will
be rejected.
15
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