Grendel as a Universal Infantry Cartridge

[cory]

...With a 140 gn bullet the Grendel comes out of the barrel at 2000 fps, giving about 80% of the .308 energy at 700 meters...

That MV is incorrect. I can safely get 2400 fps out of my 24" that seems to be on the slower side of other 24" barrels. 2225fps+ out of a 16" is a safe beat in my opinion. I'll be confirming that velocity this spring with my 16" Lilja barrel that should be en route soon.

Will a longer max COL due to magazines, those MVs can be significantly improved.

...For long range shooting at magnum velocities, the .338 family of rounds (8.6x63NM, 8.6x70LM) give similar BC of .600 (like the 6.5mm) with less barrel wear.

Maybe it is time to move to the 6.5mm for GPC for the common infantry rifle and designated marksman with one lite MG (SAW). But move to the 8.6mm (NM?) for long range sniping and the medium MG (M240).

I agree!