Table 2. Components of M821E1 projectile (81-mm) with M734 fuse (DODIC C868).
M821E1 HE Cartridge
Filler
Comp B (RDX and TNT)
2.05 lb
Ignition cartridge
M299: Black powder (charcoal, potassium nitrate,
sulfur), M9 flake (ethyl centralite [0.75%], nitrocellu-
lose [57.75%], nitroglycerin [40%], potassium nitrate
[1.5%]), primer mix 70 (antimony sulfide [14.5%], lead
thiocyanate [22.5%], potassium chlorate [53%], TNT [5%])
Propellant charge
M220 (Unknown but probably double-base [nitrocellulose
and nitroglycerin])
Primer
M55 Perc (unknown)
M734 Multi-option fuse
Pellet booster comp
A5 (RDX (98.5%)and stearic acid (1.5%)
8g
Lead charge
PBXN-5 (HMX 95% and Binder 5%)
152 mg
Detonator assembly
HMX (98%) and RDX (2%)
16 mg
Lead azide
14 mg
Primer housing assembly
Lead azide
85 mg
RDX
32.5 mg
Primer mix and output mix NOL#130 (lead styphnate
(40%), lead azide (20%), tetracene (5%), barium nitrate
(20%), antimony sulfide (15%)
54.5 mg
Output mix (lead azide (11%), zirconium (26%), lead dioxide
(60.5%), viton (2.7%)
15 mg
2,500
Mortar Impact Area
with No Fins
2,000
1,500
1,000
500
0
2
6
10
14
18
Time (min.)
Figure 4. Chromatogram (GC-ECD) from the extract of surface soil
collected in an area with no mortar projectile fins. Low concentrations
of RDX and HMX were found a short distance from the impact point.
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