How could or should the 6.5 mm Grendel be improved?

[stanc]

Reviewing some of the interesting posts on this thread. I think I asked the wrong question.

Perhaps, I would have made life easier for myself if I had asked: what could be done to help military and LE users accept and use the 6.5 mm Grendel more widely?

LE probably would not switch until after the military did.

IMO, to make 6.5 Grendel more appealing to the military would require:
- Demonstrating terminal effects equal or better than 7.62x51
- Demonstrating that a Grendel machine gun is feasible

The supplementary question is: is it good enough as is? If not, what could or should be done to improve it.

It needs some projectiles developed that are required for military use, primarily Ball and Tracer.

One of the issues I've touched upon but probably need to mention in more detail is the need for a tracer round. Would a 6.5 mm Grendel tracer need to be much longer than the existing bullet to give it the extra mass it needed to match the ball round?

It would undoubtedly be longer, but precisely how much so, I don't know. Suggest comparing the 120gr 6.5x55 Tracer bullet with the 120gr Norma FMJ to give a close approximation.