MIL-DTL-60318C (AR)
TABLE V. UNIFORMITY SERIES FOR SP PROPELLANT
No. of
Type of
Zone
Charge
Rounds
Round
Weight
7
Calibration
1
Service
7
Test
1
*
7
Calibration
3
Service
7
Test
3
**
7
Test
3
***
Notes: *
SP propellant weight as determined from charge weight
establishment.
**
Comprised of test SP propellant (charge increments 1 and 2) and
MP calibration propellant (charge increments 3)
***
Comprised of test SP propellant (charge increments 1 and 2) and
MP propellant (charge increment 3) to be loaded for charge
increments 3-7.
4.5.2.2.1 Average pressure for SP propellant. If any lot of SP propellant fired in
conjunction with MP propellant fails to meet the zone 3 pressure requirement (9,850 +/-
650 psi), the SP propellant lot shall be referred to Picatinny Arsenal: U.S. Army ARDEC,
ATTN: AMSTA-AR-WEE, Picatinny Arsenal, NJ 07806-5000.
.
4.5.3 Multi-perforated (MP) propellant assessment.
4.5.3.1 Charge weight establishment for zones 3, 4, 5, 6, and 7 (Table VI). After
charge weights for charge increments 1 and 2 been established, four groups of rounds
loaded with selected charge weights of propellant for charge increments 3, 5, 6, and 7
(weights selected should bracket expected service charge weight) shall be conditioned to
70°F plus or minus 2°F for at least 24 hours and shall be fired within five minutes after
removal from the conditioning chamber. The first group consists of seven (7) Zone 3
charges, the second group consists of four (4) zone 5 charges, the third group consists of
four (4) zone 6 charges, and the fourth group consists of seven (7) Zone 7 charges. From
the data obtained, a correlation between velocity and charge weight shall be derived using
linear regression (excluding any valid outlier), and the charge weight shall be calculated
which will yield the service velocity as specified in Table I for each zones 3, 4, 5, 6, and
7. This calculated charge weight shall then be loaded into rounds for the uniformity series
in 4.5.2.2. Calibration rounds shall be used to correct velocity.
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