MIL-DTL-1394G(AR)
7258817, or Target Practice, PGU-27, conforming to drawing 1575AS300, and inspected in accordance
with 4.4.7. The test cartridges shall be conditioned at -65oF for a period of not less then four hours after
the conditioning chamber has stabilized at -65oF ± 5oF. Timing for the conditioning period shall start
after the chamber has stabilized following the sample being placed in the conditioning chamber.
4.4.7 Function and casualty. The method of test shall be as specified in SCATP-20. The test
sample primers shall be inserted into cases that have been previously inspected for depth and diameter of
primer pocket and length to shoulder basic diameter. The sample primed cases shall be assembled as
Cartridges, 20MM, Target Practice, M55A2, conforming to drawing 7258817; or Target Practice, PGU-
27, conforming to drawing 1575AS300. Prior to firing, the test cartridges shall be inspected for depth of
primer seating, primer crimp missing, loose primer, metal slivers on case head of primer, profile and
alignment max., and presence of foreign matter on primer button. The sample test cartridges at ambient
temperature shall be fired in bursts of 50 rounds in the quantities and weapons as specified in Table VI
below. The gun barrels shall be at ambient temperature at the beginning of each burst.
TABLE VI. Function and casualty testing
M61 Weapon (5500 SPM, min)
M39 Weapon (1400 SPM, min)
Accepted primers will be used in
20mm PGU Ammunition:
300
300 1/
All other 20mm ammunition:
Primer First Article Test:
1100 1/
1/ Customers, through the procuring activity, may substitute the M61 Weapon for acceptance of primers
that will be used to fulfill their orders.
TABLE VII. Casualties
Defect Description
Accept
Reject
Cumulative
Classification
Reject
Missing button
0
1
N/A
Major
Misfire
0
1
N/A
Major
Primer leak 2/
3
9
9
Minor
Blown primer 1/
0
1
N/A
Major
Notes:
1/ The sample cartridge case shall be classed defective only if it is evident by visual inspection that both
the primer pocket and case head are enlarged and deformed.
2/ If during conformance inspection, more then three but less then nine primers show evidence of leakage,
a second sample of double the number specified by Table III (Production Lot Only) shall be tested. If, in
the accumulated samples, a button is missing, a misfire occurs, or nine or more primers show evidence of
leakage, the lot shall be rejected. Misfiring test cartridges test shall be retested in the equipment specified
in 4.4.6. Any misfires during retest shall be classified as to cause of failure and recorded as misfires in
the test record.
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
9
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business