12-04-2011, 06:05 AM
That is still good velocity. There aren't any military-grade projectiles for it, but it would be another wildcat for AR shooters. The 6mm AR requires only sizing down, while the 6.8 needs to be trimmed for length, then sized, has more powder, and more bullet selection for competitors since you can use longer VLD-types without taking case capacity, and still mag-length load.
6mm doesn't offer enough over 5.56 for 55gr-70gr performance out of an AR with FMJ pills, and doesn't have the retained energy a lot of people expect out of an LMG for 500-800m terminal performance, so that is why I lean to the idea that a 6.5mm in the 130-140gr class is ideal for a Multi-role LMG.
6mm doesn't offer enough over 5.56 for 55gr-70gr performance out of an AR with FMJ pills, and doesn't have the retained energy a lot of people expect out of an LMG for 500-800m terminal performance, so that is why I lean to the idea that a 6.5mm in the 130-140gr class is ideal for a Multi-role LMG.