30 x 126mm B United States
Details
| Type | Inert |
|---|---|
| Projectile | steel, steel fuze, olive drab, 1 copper driving band Projectile Markings: (black marker) INERT 6/23/54 Driving Band Markings: *HVM-10-254 30MM HEI T306E10* |
| Case | brass, choke crimp Markings: (black ink) FAX3M 2183 INERT |
| Primer | none |
| Headstamp | [none] |
| Notes | Inert case filler. |