AMU still testing new cartridges

[T2C]

27 of the 6.5 or 6.8 x 45 cases fit perfectly in a 25 round Pmag, it is like the feed lips were made for them. Since the SCAR 17 went through the complete approval process, it is lighter than most 308s and they have been using it in combat there is a pretty good chance that will be the platform they use. The 2 test rifles I have chambered in a similar but brass case version will push a 123gr 6.5 to apx 2700fps out of a 16" barrel and a 130gr 6.8 to the same velocity out of a 16" barrel. 110gr bullets should hit 2800 in the 6.5 and 2850-2875 in the 6.8 version.

If the projectile fired from a service cartridge would not go sub-sonic until 1,000 yards, that would be a plus. Match ammunition based on the service cartridge could be developed for precision shooting purposes.

[WillC]

No, the 264 and 277 USA cartridge design is based on a slightly shortened 6.5 Carcano case

Lee Harvey Oswald approved.