
 
            | Type | TP, M55A2 | 
|---|---|
| Projectile | steel, aluminum windscreen, black, 1 copper driving band Projectile Markings: (white ink) 20MM BALL M55A2 LC-22-246 Driving Band Markings: * HA 5-16 60 20MM M55A2 * | 
| Case | brass, choke crimp | 
| Primer | electric, flat, brass, ring crimp, red annulus | 
| Headstamp | [none] |