A few days ago Confederate Yankee wrote that Remington were not developing a 6.5mm cartridge. This contradicted what Adam Heggenstaller reported a couple of weeks ago. I checked with Jessica Kallam (Freedom Group – Remington’s parent company), and the statement Confederate Yankee posted on his blog is the official statement regarding the ACR and 6.5mm round …

We are not currently in the process of developing our own 6.5mm round for the AR platform. We have mentioned the 6.5 in our communications on the ACR simply because that platform is capable of handling the Grendel or something like it. At this point, there are no plans to chamber the ACR for the Grendel. However, that may change if we receive enough input from the marketplace to make it seem necessary.

Remington Military Products Division still list it as a caliber on their ACR webpage.

Screenshot of the Remington ACR webpage.

I expect this has generated much confusion as the company now has an official statement regarding the issue. For now the only 6.5mm cartridge in the Remington stable is the .260 Remington¹

Many thanks to rootman for sending me the top link.