MIL-DTL-48360A (AR)
4.4 Tests methods and procedures.
4.4.1 Cloth. At the time cloth is introduced to the sewing and/or cutting operation,
identification shall be made for each roll to verify that proper material is used. Any cloth failing
to be identified as proper material in accordance with drawings and specifications shall be
rejected from the lot.
4.4.2 Propellant weight. The propellant charge placed in a container, shall be weighed
and then checked weighed in a different balance. If the weighing is performed manually, use
another operator for checkweighing. The propellant charges that are not within the limits shall be
rejected.
4.4.2.1 Propellant weight from assembled propelling charge.
4.4.2.1.1 Average weight of propellant bags. A minimum of four (4) weighings must be
made of empty bags during each shift to check for variation from nominal weight. Two (2) of
these weighings shall be made during the first half of the shift and the other two weighings shall
be made in the second half of the shift. Additional bag weights shall be taken, as required.
4.4.2.1.2 Procedure. Accurately weigh the assembled charge on a balance. Then,
calculate the net weight of the propellant by difference using the average weight of the empty
bags (as determined in 4.4.2.1.1). The calculation may also be performed by using the tare as
marked on the individual bag instead of the average weight of the empty bags.
4.4.3 Proving ground.
4.4.3.1 Assembled charge assemblies. The charge assemblies shall be assembled in
cartridge cases, inert filled projectiles and dummy fuzes at ambient temperature. Condition the
complete rounds at the required temperatures prior to firing. Fire the complete rounds, within
five minutes after removal from the conditioning chamber. The rounds shall be fired in an
M20A1 tube which has a tube wear of no less than 50% of life remaining.
4.4.3.2.1 PIMP pressure and average pressure (+145°F). Condition the rounds for 16
hours minimum for zone 8 firings, at +145°F + 5°F. Determine the pressure for each round.
Calculate the mean pressure and pressure standard deviation.
4.4.3.2.2 Muzzle velocity and pressure (+70°F). Condition the rounds for 16 hours
minimum, for zone 8 firings at 70°F ± 2½°F. Calculate the mean muzzle velocity, muzzle
velocity standard deviation, mean pressure and pressure standard deviation.
4.5 Packing. Level B- Twenty eight (28) propelling charges shall be packed in fiber
drums and visually verified as described in section 3.8. Fiber drums are approved for truck or
trailer on flat car (TOFC) shipment only and for storage not exceeding two years.
4.6 Marking. All required marking shall be neat and sharply defined.
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