Artillery ammunition comprises several types designed (fig. 4-1) for ease in handling and loading. Fixed rounds are used in gun cannons and recoilless rifles; semifixed, in howitzers and mortars; separated, in tank and antiaircraft guns; and separate-loading, in large caliber guns and howitzers.
a. Fixed. In this type of ammunition, the complete round is issued with the cartridge case (containing a nonadjustable propelling charge and a primer) permanently crimped or otherwise attached to the projectile. The complete round is loaded into the weapon as a unit.
(1) In howitzer ammunition, the cartridge case is loose-fitted over the base of the projectile.
A-FUZE B - BOOSTER C- PROJECTILE D- OGIVE E - BOURRELET F - BURSTING CHARGE G ■ ROTATING BAND H-CRIMP J-BASE COVER K-CARTRIDGE CASE L- PROPELLING CHARGE M-PRIMER N- LIFTING PLUG P - GROMMET Q - IGNITER
R ■ CASED PROPELLING CHARGE S-CLOSING PLUG T-DISTANCE WAD U - IGNITER CHARGE ASSEMBLY
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