Our military adopting the Grendel?

[stanc]

Yes we do need to play with the 6.8 SPC case because it isn't chambered in 6.5mm. Will it seat longer bullets well? Will it deal with pressures in a predictable manner? What powders will be best pushing 6.5 out of the SPC case? etc. etc. We also don't need to load the Grendel longer for LMG's...

The shorter Grendel case allows more compactness in receiver design, although it is probably negligible.

Perhaps I wasn't clear. I meant use 6.8 SPC, not 6.5 SPC.

As for loading long bullets, the guys over at 68forums have been doing that with 6.8 SPC for awhile, as has HPI with the 6.5 and 6.35 HPI-SPC.

Regarding the use of the 6.8/6.5/6.35 SPC loaded to longer than 5.56 mag length, I was going by what you wrote in the Grendel LMG thread:

http://www.65grendel.com/forum/showthrea...#post14506

If you are dropping the idea of loading long, and returning to the 2.25" OAL, then certainly 6.5 Grendel is the better choice.