MIL-DTL-50647B
sensitivity. In the event loaded cartridges are selected for test, remove and discard all powder charges
from the test cartridge by sectioning the cartridge case around the periphery, ½ inch maximum above the
base. Drop test at 13 inches (adjusted) using a steel ball 15/16-inch in diameter, weighing 1.94 ± 0.02
ounces, in a ignition device sensitivity machine with a cartridge holder approved by the acquiring agency.
The height of 13 inches shall be adjusted taking into consideration the actual weight of the ball so that
the energy level specified in 3.6.1 is achieved. Failure of the sample to comply with the requirements of
3.6.1 shall be cause for rejection of the sample or the lot.
4.7.8.2 Ballistics.
4.7.8.2.1 First article. Twenty-one cartridges of the first article sample shall be grouped and
temperature conditioned as described in table III and 4.8. Following removal from the conditioning
chamber, the cartridge shall be tested as required by 3.6.2.2. Failure of a cartridge to comply with the
requirements of 3.6.2.2 shall be cause for sample rejection.
4.7.8.2.2 Production lot acceptance. Twenty-one assembled cartridges from each production lot shall
be divided into three equal groups, temperature conditioned, and fired in accordance with 3.6.2.2. If the
sample is not evenly divisible by three, the remaining cartridges will be tested at -60° and 205° F. Failure
of a cartridge to comply with 3.6.2.2 shall be cause for rejection of the lot. In addition to the sample of
cartridges for the above test, 10 additional cartridges shall be furnished from each production lot for
investigative purposes.
4.7.8.3 Retest. There shall be no retests.
4.7.8.3.1 Test failure. If a test failure is attributable to an assignable cause, excluding the test cartridge,
the original test results shall be discarded and that test reconducted.
4.8 Temperature conditioning. The conditioning chamber shall be preconditioned to the specified
temperature. Once the temperature inside the chamber has stabilized, the samples shall be placed inside
and maintained at the specified temperature for 4 hours minimum, 24 hours maximum.
4.8.1 Reconditioning. The sample must be tested within five minutes after removal from the
conditioning chamber. If this time is exceeded, the cartridge shall be reconditioned in accordance with
4.8.
4.9 Inspection of packaging. The sampling and inspection of the preservation, packing, and container
marking shall be in accordance with the requirements of section 5.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract
or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging
activities within the Military Service or Defense Agency, or within the military service's system
commands. Packaging data retrieval is available from the managing Military Department's or Defense
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