
| Type | Ball |
|---|---|
| Projectile | FMJ, CNCS |
| Case | brass, taper crimp |
| Primer | percussion, flat, nickel, ring crimp, red annulus |
| Headstamp | F A 52 |
| Notes | This round is from a US study undertaken during the process of selecting the NATO-standard rifle cartridge in the early 1950s. It has a 7mm projectile (provided by the UK) in a necked-down FAT1E3 case. This may not officially be a 7mm Compromise (those were typically made by Belgium, Canada, and the UK) but it is listed as such since it appears to have identical dimensions. |