(Fig. 16)

The three types, Oerlikon (air service), Mauser (air service) and Solothurn (land service), as shown in the drawing, can be identified by the cartridge cases. The Oerlikon and Mau-ser cases are similar but the Oerlikon is smaller in diameter, is without a pronounced ta-per and shoulder below the mouth and the forward side of the groove near the base is radiussed. The Solothurn case is longer than the other types and has a positioning band, or belt, formed in front of the groove near the base.

In the following details of the three types of ammunition small variations in weights may, in some instances, be within the tolerances permitted in manufacture and, in the case of propellant charges, may be the result of the adjustment of charge weight for a particular propellant lot. In a number of instances the identification markings on the projectiles do not conform with the principles of the system described in this pamphlet, but in most of these instances the projectiles are of the older types, many of which are not now in use. The colours of the traces are those produced when the composition is ignited with the projectile static. With the projectile in flight it is possible that these colours may appear different.

Fig. 16

GERMAN 2 cm CARTRIDGES