Alternative to 6.5 Grendel?

[stanc]

Stanc's topic seems to explore what else there could be to deliver good performance from the system, and we certainly have looked at .257" bore before. I actually think .257" would make an excellent military bore for assault rifles and LMG's, especially with high SD projectiles for the LMG's and DM/SASS weapons, but you would have to go to a different case if conforming to trends in COL, and the magazines that are common for assault rifles. Basically, don't exceed that 2.260"-2.350" COL. The reason is how the mags stack on the soldier's load bearing equipment, and the varying body types of soldiers.

I may be mistaken, but I don't see why increasing COL to 2.45-2.55" would have a significant adverse effect on this issue.