MIL-C-46409D (AR)
APPENDIX "H" (CONT'D)
required pounds per square inch below atmospheric pressure and shall be held at that pressure for
the specified time. The number of bubbles liberated from the mouth or primer, or both, of each
cartridge shall be observed. At the end of the specified time, the vacuum shall be released from
the glass test chamber, the lid removed and the ammunition removed.
30.2.3 the procedure prescribed in 30.2.1 and 30.2.2 shall be repeated until the required
number of cartridges has been tested.
40.0 RECORDING OF DATA
Results of Waterproof Test shall be recorded as follows:
40.1 No leak.
40.2 slow leak. A series of two or more air bubbles appearing at the primer or mouth of the
case, or both but which are liberated at such rate that only one bubble from either the primer or
the mouth of the cartridge is in transity to the surface at any one time.
40.3 Fast leak. A series of air bubble appearing at the primer of mouth of the case, or both,
which are liberated at such a rate that more than one bubble from the primer or the mouth of the
cartridge case is in transit to the surface at any one time.
40.4 Location of leak. Identify area of leak with machinist layout ink.
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