The 6.8 would solve nearly every problem.
“The 6.8 would solve nearly every problem.”
Except that it’s not a 7.62x51mm :) There is nothing wrong with the M14 except the person pulling the trigger. Just use the 7.62x39mm if we want something between a battle rifle and 5.56mm.
It'd require all new magazines. Try 7,62x40 WT.