MIL-DTL-48623A (AR)
TOP 1-2-608 - Sound Level Measurements
(Copies of these documents may be ordered from the US Army Developmental Test
Command, ATTN: Publications, 314 Longs Corner Road, Aberdeen Proving Ground,
MD 21005-5005, or online at https://www.dtc.army.mil/publications/topsindex.aspx.)
2.4 Order of precedence. In the event of a conflict between the text of this
document and the references cited herein, the text of this document takes precedence.
Nothing in this document, however, supersedes applicable laws and regulations unless a
specific exemption has been obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample of the M1A1 cartridges
shall be subjected to first article inspection in accordance with 4.3.
3.2 Conformance inspection. A sample of the M1A1 cartridges shall be subjected
to conformance inspection in accordance with 4.4.
3.3 Cartridge. The cartridge shall comply with all requirements specified on
Dwg 9326760.
3.4 Material. Materials shall be in accordance with all requirements specified on
Dwg 9326760.
3.5 Residual stress. The blank cartridge case shall not split when subjected to a
one percent mercurous nitrate solution for fifteen (15) minutes.
3.6 Screen perforation. The blank cartridge, when fired from a M2-HB (Heavy
Barrel) machine gun, shall not cause perforations of 0.1 inch or greater in diameter in
paper screen placed in the line of fire at a distance of 15 feet from the muzzle of the
weapon.
3.7 Muzzle flash. The flash produced at the muzzle of a M2 HB machine gun
shall be visible 100 yards from the weapon under conditions of darkness.
3.8 Fouling. The fouling produced by firing 500 blank cartridges shall not cause a
change in the cycle rate shall not exceed fifteen (15) percent from the first to the last
burst from a M2 HB Machine gun.
3.9 Waterproof. The blank cartridge shall not release more than one bubble of air
when subjected to a pressure of 12.7 pounds per square inch (psi) and held at that
pressure for 15 seconds.
3.10 Function and casualty. The blank cartridge shall function in the M2 HB
machine gun without casualty at 0° to 125° Fahrenheit.
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