20 x 102mm United States
Details
| Type | Dummy |
|---|---|
| Projectile | steel, aluminum windscreen, black, 1 copper driving band Projectile Markings: (white ink) FA-E 319 T61E1 Driving Band Markings: 20MM M99 MAT-4-13-45 |
| Case | brass, knurled choke crimp, 3 holes |
| Primer | none |
| Headstamp | F A * 48 * |