Hornady’s team discusses the 6mmARC in THIS YouTube video and at 15:14 one says, “Terminally, the goal of the original project was to meet or exceed .308 terminal performance at distance…. And it did exceed that…. When you went to 6mm, you had that.” Another chimes in, “That’s interesting: You picked up terminal performance by reducing the bullet weight and diameter — because of the velocity performance. So, now you have a warfighter that is equipped with the small, lightweight AR15-sized platform that’s been the standard, but you have all the external characteristics of the .308 Winchester at range.”

They're saying the same thing we've always said about the 6.5 Grendel, and now the 6mm ARC.

Yeah, the ARC isn’t so different than the 6.5 and 6 Grendel, but they sure do promote and market it well.

I wonder how the Grendel would have done had it had more big corporate promotion.

The 6.5 Grendel still has room for growth: Berger needs to do a 110–115gr in their Long Range Hybrid Target design. Would open some eyes.

I watched the vid. I thought it was informative, gave some history and background which is always nice. Big advantage they were looking for was longer reach, they started out with a grendel and it was great but didn't have long enough "legs" for what the SOF guys were asking about... seems like the 500-800 yd, maybe 1k distances. One of the guys on the vid is also a PRS or some kind of long-range shooter, and pretty good. He uses a 28" 6Arc bolt gun for his comps.

Each cartridge has its uses and good points. Even my old-fashioned 308...!!

ps, found some of the 100 gr Sierra Tgk's, they are, like, made for this 6Arc hunting-wise!