Browning machine gun caliber .50, M2, aircraft, fixed and flexible. Page: 47
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TM 9-225
BROWNING MACHINE GUN, CALIBER .50, M2 31-33
31. Care, handling, and preservation.-a. Ammunition boxes
should not be opened until the ammunition is required for use. Am-
munition removed from the airtight container, particularly in damp
climates, is likely to corrode, thereby causing the ammunition to
become unserviceable.
b. The ammunition should be protected from mud, sand, dirt, and
water. If it gets wet or dirty, wipe it off at once. Verdigris or light
corrosion should be wiped off. Cartridges should not be polished,
however, to make them look better or brighter.
c. The use of oil or grease on cartridges is prohibited.
d. Do not fire cartridges with loose bullets or other defects.
e. Ammunition should not be exposed to the direct rays of the sun
for any length of time. This is likely to affect seriously its firing
qualities.
f. Whenever cartridges are taken from cartons and loaded into
belts, the latter will be tagged so that the ammunition may be identi-
fied as to lot number. Tagging is necessary to preserve the grade
of the ammunition.
32. Storage.-a. Whenever practicable, small arms ammunition
should be stored under cover. This applies particularly to tracer
ammunition, which is subject to rapid deterioration if it becomes
damp and may even ignite spontaneously. When necessary to leave
small arms ammunition in the open, raise it on dunnage at least 6
inches from the ground and cover it with a double thickness of tar-
paulin. Suitable trenches should be dug to prevent water flowing
under the pile.
b. If practicable, tracer ammunition should be stored separately
from other ammunition.
c. If tossed into or placed in a fire, small arms ammunition does not
explode violently. There are small individual explosions of each
cartridge, the case flying in one direction and the bullet in another.
In case of fire, keep personnel not engaged in fighting the fire at least
200 yards from the fire and have them lie on the ground. It is un-
likely that the bullets and cases will fly over 200 yards.
33. Authorized rounds.-The following ammunition of appro-
priate grade (par. 28) is authorized for use in the Browning ma-
chine gun, caliber .50, M2, aircraft, fixed and flexible. It should be
noted that the nomenclature used (standard nomenclature) com-
pletely describes the cartridge as to type, caliber, and model. Its
use for all purposes of record is mandatory. All of the following47
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United States. War Department. Browning machine gun caliber .50, M2, aircraft, fixed and flexible., book, April 30, 1942; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc29988/m1/49/: accessed May 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.