Practice M

Although PPA (see 7, Figure 2-17) closely replicates the trajectory and characteristics of service ammunition out to 25 meters, it should not be used to set the combat battlesight zero of weapons to fire service ammunition. The setting that is placed on the sights for a weapon firing PPA could be different for service ammunition.

If adequate range facilities are not available for sustainment (particularly Reserve Components), PPA can be used for any firing exercises of 25 meters or less. This includes the 25-meter scaled silhouette, 25-meter alternate qualification course, and quick-fire training. Units that have an indoor range with adequate ventilation or MOUT site could use PPA. (See Appendix C for use in training.)

Cartridge, 5.56-mm, Ball, Ml 93. The M193 cartridge is a center-fire cartridge with a 55-grain, gilding-metal, jacketed, lead alloy core bullet. The primer and case are waterproof. The Ml93 round is the standard cartridge for field use with the M16A1 rifle and has no identifying marks (see 1, Figure 2-17). This cartridge has a projectile weight of 55 grains and is 1.9 cm long, with a solid lead core.

Figure 2-21. Ammunition for 5.56-mm M16A1 (1 through 4 and 7) and M16A2 (3 through 7).

Cartridge, 5.56-mm, Tracer, M196. (Used in the M1√ďA1 rifle.) The Ml96 cartridge is identified by a red- or orange-painted tip (see 2, Figure 2-17). Its main uses are for observation of fire, incendiary effect, and signaling. Soldiers should avoid long-term use of 100-percent tracer rounds. This could cause deposits of incendiary material/chemical compounds that could cause damage to the barrel. Therefore, when tracer rounds are fired, they are mixed with ball ammunition in a ratio no greater than one-to-one with a preferred ratio of three or four ball rounds to one tracer round.

Cartridge, 5.56-mm, Ball, M855. The M855 cartridge has a 62-grain, gilding-metal, jacketed, lead alloy core bullet with a steel penetrator. The primer and case are waterproof. This is the NATO standard round for the M16A2 rifle (also used in the M249 SAW). It is identified by a green tip (see 5, Figure 2-17). This cartridge has a projectile weight of 62 grains and is 2.3 cm long, with a steel penetrator in the nose.

Cartridge, 5.56-mm, Tracer, M856. (Used in the M16A2 rifle.) The M856 tracer cartridge has similar characteristics as the M196 but slightly longer tracer burnout distance. This cartridge has a 63.7-grain bullet. The M856 does not have a steel penetrator. It is also identified by a red tip (orange when linked 4 and 1) (6, Figure 2-17).

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