
| Type | Ball, M2 |
|---|---|
| Projectile | FMJ, GMCS, 1 knurled crimping cannelure |
| Case | brass, segmented taper crimp |
| Primer | percussion, rounded, brass, ring crimp, green annulus |
| Headstamp | A | N | 40 | 5 | |
| Notes | This is a clandestine US loading, although not specifically for the Bay of Pigs as is commonly noted. |