01-19-2014, 07:55 PM
stanc Wrote:Perhaps. I'm still waiting to see test data that confirms it.
6.5 Grendel is the closest production round, but there are some experimental 6.5mm cartridges that reportedly are superior. These are essentially "stretched" versions of 6.5 Grendel. One such is a 6.5x45 being developed by Harrison.
The Grendel was designed to be 6.5x39. Was that to pattern after the 7.62x39? Does the 6.5x45 work as well in M4/M16 mags?

