New Army "Caliber Configuration Study"

[JASmith]

7.62mm is the standard chambering for US tank co-ax machine guns, and M80 Ball does a good job of ventilating auto and truck bodies. What a .308" 147gr bullet can do, a .338" 300gr projectile ought to do even better.

The question refers to the .338 vs .50 cal and the metric is whether "good enough" holds.

You can see that Cory is getting us close to an answer. "Doubtful" still needs to be backed up with numbers.