How could or should the 6.5 mm Grendel be improved?

[JASmith]

It turns out that a 62gr 5.56mm bullet scaled to 6.5mm is very close to that weight. That suggests scaling the current 5.56 up to 6.5 could form a basis for assessing the Grendel. The steel core makes a difference in thin armor defeat making the scaling even easier.

I haven't recently run the ballistics numbers, but will soon.

I know that some advocate tests before making claims but we need to do the analysis in order to drum up enthusiasm for testing.