20 x 102mm United States
Details
| Type | TP, T154 |
|---|---|
| Projectile | steel, black, 1 copper driving band Projectile Markings: (white ink) 20 MMTP T-154 LC-1-2 Driving Band Markings: *HMC-1-7 52 20MM T61E4* |
| Case | brass, knurled choke crimp |
| Primer | electric, flat, brass, ring crimp, red annulus |
| Headstamp | L C 52 |