6 x 45mm Brunswick United States
Details
| Type | Ball |
|---|---|
| Projectile | FMJ, Soft Point, GM, 1 knurled crimping cannelure |
| Case | brass, taper crimp |
| Primer | percussion, flat, nickel |
| Headstamp | WCC 74 556 |
| Notes | This is reported to be an unsolicited submission to the SAW trials by Brunswick. |