this has literally never happened, and literally never will..Two separate groups of 10 riflemen are sitting stationary in parallel lines 900 yards apart from each other on flat ground w/ no cover. One group is armed with AR15s chambered in 5.56x45/.223 (55gr). The other group is armed with bolt-action rifles w/ 26" bull-barrels chambered in 7.62x51/.308 (168gr).
If the two groups are firing upon each other... Which group of rifleman is going to more deadly?
so i'll counter you: same dudes, same guns, but we're in a shopping mall, or house, or farm, or hospital, or park, or forest, or desert, or a church, or, or, or, or, or.....