How could or should the 6.5 mm Grendel be improved?

[JASmith]

...I think the requirement is very simple:

Unprotected human target: 600 metres
Protected human target (10 mm) 100 metres
Effective suppression to 1,200 metres

Wind drift, trajectory, drop, velocity and energy values should all be comparable to 7.62 mm.

So make a round that is a ballistic match and put it in the lightest package possible. Save at least 30% in weight.

This is an excellent step forward!

The word "comparable" when attached to drift, trajectory, velocity, and energy gives latitude for trades.

The remaining quibbles are:

• Protected Human Target (10 mm) at 100 metres
  
• "Effective Suppression to 1,200 meters"
  

One presumes 10 mm refers to armor of some sort. Are we referring to mild steel, a specific hardness of armor steel, or a ceramic plate? What is required in the form of wounding capability after perforating the protection? Holes in a 3mm Aluminum plate placed 100 mm behind the barrier? Something else?

How do we define "Effective Suppression?" As it stands the term is subjective. I have some thoughts but would prefer to work the speculation through the PM mode.