TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9-2350-311-10 5-10 Table 5-1. 155MM AMMUNITION FOR M109 HOWITZERS - CONTINUED Authorized Projectiles Classification Identification Fuzes Remarks M864, HE, DP extended range, ICM WARNING • A 5000–meter safety zone is required short of the target because of the possibility of the base burner assembly non– ignition. • The M864 projectile is not to be fired if the obturator is missing or broken because it may result in a short round. If the band is displaced and can be repositioned and remain in the groove, the projectile can be fired. • For M864 projectiles marked with three solid white circles 120° apart on the ogive (above the weight zone markings) avoid hazards resulting from gaps at the base to body joint and from separation of the base from the body in the M864 projectile by following these safety procedures: Projectiles are to remain palletized as long as possible prior to use. Do not transport projectiles as loose cargo. Do not fire projectiles received without grommets or with evidence of dents, flattenings, or gouges to the lifting plug, grommet, rotating band, and boatail area. Do not fire projectiles which have been dropped loose from supply vehicles or SP howitzers. Any base separations should be handled by EOD personnel. • A gap at the base to body joint of the projectile may lead to hot propellant gases entering the round during firing and causing an inbore premature. Gaps are not detectable with a visual examination due to the presence of the obturator over the base to body joint. In addition, a separation of the base from the body of the projectile will expose M42 and M46 grenades. Arming could occur and result in injury and/or death. NOTE • The M864 is for extended range only. Use the M483A1 projectile through the M119A2 charge (zone 7) where applicable. The M864 shall be fired to achieve ranges beyond the capabilities of the M483A1 projectile or when the M483A1 projectile is not available. • For stowage of M864 projectiles, see para F-5.