6.45 x 48mm GP 80 Switzerland
Details
| Type | Ball |
|---|---|
| Projectile | FMJ, CNCS, 1 smooth crimping cannelure |
| Case | brass, segmented taper crimp |
| Primer | percussion, flat, brass, 3-stake crimp, black annulus |
| Headstamp | T 5 T 81 |
| Notes | This is an experimental caliber developed along with the SIG SG 550 rifle, which was later adopted in 5.56x45mm. |