20 x 110mm USN United States
Details
| Type | Inert |
|---|---|
| Projectile | steel, aluminum windscreen, brown, 1 copper driving band Projectile Markings: (white ink) 20 MM DUMMY 1-5 LC-53 Driving Band Markings: * 20-MM MK. 11-0 A LOT HMC (in box) 1-10 * |
| Case | brass, choke crimp |
| Primer | no primer pocket |
| Headstamp | [none] |
| Notes | Inert case filler. |