Please.
Please.
Let that stupid MYTH about a "wounding" bullet die.
There was NEVER any specification for a "wounding" bullet.
The 5.56mm bullet's primary wounding mechanism is penetration and FRAGMENTATION. Always has been.
And trying to clear a room with an M14 is much less than ideal. Compact firepower (M4 with 14.5" barrel is a much better choice when entering tight quarters against multiple opponents.
M14s are being used by all services, but in SUPPORT of soldiers carrying 5.56mm rounds.
Um, tell that to McNamara. He's stated repeatedly that that was the logic behind his order to adopt it.
Note that I didn't say that I necessarily agreed, just that that was the logic behind it.