20 x 102mm United States
Details
| Type | Dummy |
|---|---|
| Projectile | steel, aluminum windscreen, black, 1 copper driving band Projectile Markings: (white ink) 20MM DUMMY EXPERIMENTAL Driving Band Markings: *HVM-20-63 54 20MM T283E1* |
| Case | brass, knurled choke crimp |
| Primer | none |
| Headstamp | [none] |
| Notes | Lot number has been removed. |