Grendel LMG

[stanc]

The 7.62x54 is more powerful than the 7.62x51 NATO. It is closer to the 30.06. So the comparison would favor the x54.

The idea is that you can have a light machine gun of acceptable power with much less weight and ammo commonality with your rifles. The comparison should be the RPD in 7.62x39 and the RPD in Grendel.

I disagree. As I read it, the proposal by LRRPF52 is for a Grendel LMG "to provide the same downrange benefits as 7.62 GMPG's such as the PKM and MAG58." Since he also notes the potential for a one-caliber system using 6.5 Grendel, that means it would have to be good enough to not only replace 7.62x54R in the V4 armies, it would have to be good enough to not be outranged by the PKMs used by the Russian army (the threat for which the V4 nations created a military alliance).

You could do the x54 comparison for reference, but no way will the Grendel match it, even at long range.

I don't know if it's necessary to match terminal performance, although the closer we can get to equal performance, the better. More importantly, I think it's vital to match effective range, for the reason noted above.

You can demonstrate the weight difference, though. The Grendel ammo will be much lighter than the x54.

Absolutely, a comparison of weapon and ammo weights should be part of any presentation.