Quote Originally Posted by mexica View Post
Isn't the case longer, preventing it from using some of the longer and heavier higher bc bullets?

Sent from my SM-S916U using Tapatalk
I think that is the reason why the linked article references 87gr 6mm and not the 100+gr common long range bullets.

All these rounds are cool, but to me the reality is that with the NATO standarization and economics of 223/556 and 9mm, they are just hard to beat. Yes, teh AR15 should have a slightly larger round, but that is the mag well and bolt we have to work with.

All this stuff is cool, and the 6ARC is the closest I’ve come to getting something outside the 556/308 rifle rounds.