Grendel as a Universal Infantry Cartridge

[JASmith]

The .25 Bailey is the .223 Remington...

Thanks -- that's an interesting cartridge and might be fun to shoot!

I would include a third GPMG in the infantry platoon and look to getting either the M-240L or MK-48 in their hands.

One of the possible outcomes of the discussions is very much along the lines you suggest: Get the best practicable lethality and range from the 5.56 and increase the numbers of 7.62X51. Problem with the second part is the Tony Williams debate indicates that all those M80 rounds weigh a lot.

A 90gr match bullet is very long, would require a fast twist and is, IMO, the wrong direction to go for a general purpose Infantry firearm.

You may be right, but we need to establish rational alternatives to inform a debate. The analysis suggests that the heavy bullet might work, but not necessarily as a GPMG cartridge substitute.