
| Type | Inert, M172 (Special) |
|---|---|
| Projectile | FMJ, GM, blue tip, 1 knurled crimping cannelure |
| Case | brass, taper crimp, 1 knurled (neck) cannelure |
| Primer | no primer pocket |
| Headstamp | LC 77 INERT |
| Notes | This round has an inert filler to simulate the weight of a powder charge. It was used to test automated packing equipment for the Cleveland Development Corporation |