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|  MIL-C-63990C (AR)
4.6 Methods of inspection. The following tests shall be
conducted in accordance with the test procedure document, SCATP-
5.56MM (Heavy Bullet):
Bullet extraction
Waterproof
Residual stress
EPVAT
Chamber pressure
Port pressure
Velocity
Action time
Temperature stability
Function and casualty
Fouling
Bullet integrity
Accuracy
Trace
4.6.1 Hardness testing. The bullets shall be extracted,
the propellant removed and the primers extracted. Each cartridge
case of the sample shall be prepared and placed on the
appropriate test fixture for testing in accordance with ASTM
Method E 92.
4.6.1.1 Case sidewall. The average of the hardness values
of the sample cases for each prescribed point along the sidewall
exterior surface shall be computed and recorded in accordance
with the drawing requirements.
4.6.1.2. Case head The individual hardness value for each
prescribed point on the head section section of each sample case shall be
recorded. Any value failing to meet the drawing requirement at a
prescribed point(s) shall be cause for measurement of hardness at
the corresponding point(s) on the opposite side of the primer
pocket of the same head section from which the initial value was
obtained. The higher of the Two measurements shall be recorded
as the value of record for determination of conformance to
drawing requirements.
PACKAGING
5.
5.1 Packing - Level A.(Worldwide shipment)-The
cartridges shall be packed in accordance with Drawing 12551963 or
12590217.
5.2 Marking and labeling. Packing boxes shall be marked
and labeled in accordance with the applicable drawing cited in
5.1.
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