20 x 102mm United States
Details
| Type | Dummy |
|---|---|
| Projectile | steel, aluminum windscreen, black, 1 copper driving band Projectile Markings: (white ink) 20MM DUMMY LC-S-40-3 Driving Band Markings: *HA 5-1 60 20MM M55A2* |
| Case | steel, choke crimp, cadmium plated Markings: (black ink) INERT |
| Primer | electric, flat, brass, ring crimp, red annulus |
| Headstamp | [none] |
| Notes | Inert case filler. |