20 x 102mm United States
Details
| Type | TP, M55A2 |
|---|---|
| Projectile | steel, aluminum windscreen, blue, 1 copper driving band Projectile Markings: (white ink) 20 MM TP M 55 A2 LC-24-382 ZDP-4-27-70 M55A2 Driving Band Markings: *LC-4-1*58*20MM*M58A2* |
| Case | brass, choke crimp |
| Primer | electric, flat, brass, ring crimp, red annulus |
| Headstamp | [none] |