How could or should the 6.5 mm Grendel be improved?

[Guardsman26]

Gdsm62 Is that not reinventing the 6.5x47 Lapua. Or am I missing something?

That's a very good question.

The 6.5 mm x 47 together with the .260 Rem and 6.5 mm Creedmoor are all excellent rounds. In fact, they quite comfortably exceed 7.62 mm in a package that shoots flatter, faster and with less recoil. As JAS points out, they're the same weight and size as 7.62 mm NATO, so may not offer a sufficient increase in overall capability to justify the effort of switching.

What we would ideally like is 6.5 mm x 47 performance in a 6.5 mm x 39 package. Sadly, that dog just won't hunt. Therefore, what I'd like to see is something in between.

The 7.62 mm x 39 case is an ideal start point for an intermediate round. But if an extended 6.8 mm x 45 case were used instead, the round would have an even smaller diameter allowing more to be fitted into a standard magazine.