I think 7.62mm is overkill in close quarters combat situation.
I see no problem with that.
I’ve heard people who’ve tried to stop bad guys with 5.56mm rounds at 25 meters have been known to change their minds about carrying the heavier weapons and mags.
Something you guys aren't talking about.
The 5.56 will not reliably shoot through a block wall. A 7.62x39 and of course the 7.62x51 will. Most folks are behind cover during a fire fight of the military type vs TV.
Same goes for car windows, etc. (I am not saying the little slug won't shoot through windshield glass, just in which direction it will be going after it gets through is the question)
I would love the little AR15 w/gas piston and in 6.5mm. Just way to much money for me. I'll keep my AK's and bolt guns.
I stocked up on Wolf and surplus for both back 6 or 7 years ago;-)
And my problem with overkill would be?...
I like the 7.62 Nato round for any situation that may arise. While my new Sig 556 is a great answer to the AR in the 5.56mmm realm (dependable and accurate, AK meets AR), the caliber still stinks overall IMHO considering the rounds out their that have much better ballistics. I prefer my (shortened) FAL tactical. Works great in close quarters and long range too with plenty of stopping power.
There is no such thing as 'overkill' in a combat situation.
Take it from me, NOTHING is overkill in a close quarter combat situation!