20 x 110mm HS United States
Details
| Type | Inert |
|---|---|
| Projectile | steel, black, 1 copper driving band Driving Band Markings: PMC 6-3 52 20MM TP |
| Case | steel, knurled choke crimp, zinc chromate plated Markings: (black ink) INERT FAX 20 1967 |
| Primer | electric, flat, brass, ring crimp, black |
| Headstamp | P E 53 |