20 x 102mm United States
Details
| Type | TP |
|---|---|
| Projectile | steel, aluminum windscreen, black, 1 copper driving band Projectile Markings: (white ink) FA-E 316 T61E1 Driving Band Markings: AGS-47-45-20MM-M99 |
| Case | brass, knurled choke crimp |
| Primer | percussion, flat, brass, 3-stake crimp, red annulus |
| Headstamp | F A * 48 * |