I'm well aware of the advances. However, I can tell you that 6mm or .30 trumps 5.56 every single time w/o exception and the military is actually looking to replace the 5.56 with a 6mm cartridge. 5.56 is a weak performer. There are myriad reports of troops having to double/triple tap enemy combatants to get them down. This is a waste of ammo and saps faith in their own gear. 6mm or.30 doesn't tend to have this issue. The energy dump is much, much more. A .243 or 6.5 has more energy at 500 than a 5.56 does at 100 and with a barely-noticeable recoil difference, especially in a gas-operated platform.
The M-14 is on the way out as a DM rifle anyway in favor of newer platforms like the HK417 or FN MK20.
We can disagree all day long, but ballistics don't lie. The 5.56 is barely an intermediate round. It's still a .22 caliber round with all the inherent faults. The Corps referred to it as a "poodle shooter" when I served. It wasn't well liked. Ditto the myriads of soldiers I know who share a disdain for it.
I find it interesting that of all the people I know who are civilian shooters who were in the military in combat MOSs and who use an MSR of some type, none are in 5.56. They are either in .243, 6.5. or 7.62. You can guess why. They don't trust the 5.56 round other than for nuisance animals like coyotes. I've seen coyotes take 5.56 rounds center mass behind either leg and limp off to die in the bush. Never seen or had this happen to me or guys I hunt with using a .243, 6.5, or 7.62. They are DRT. And we don't hunt with FMJ.
If a superior (than issue) round being used on coyotes is suspect on occasion, you can imagine the troops who actually need decent rounds are hungry for something that actually performs as it should. 5.56 has been shown to be weak and ineffective except in a crew-served hail of rounds scenario or extremely close in. 6mm/.30 allows troops to keep the enemy further out there while still taking them down.
You're using so much of the silly non-shooter/non-military buzzwords that I'm pretty sure you've never carried a weapon or spent a single day on active duty.
I'm done with this discussion, as almost everything you're posting is just made up absurdity at this point.
5.56 has been used to great effect since the Vietnam war. It's still in use by the entire NATO alliance and will likely be the cartridge of choice there for the next forty years as well.
The M-14 is on the way out as a DM rifle anyway in favor of newer platforms like the HK417 or FN MK20. We can disagree all day long, but ballistics don't lie. The 5.56 is barely an intermediate round. It's still a .22 caliber round with all the inherent faults. The Corps referred to it as a "poodle shooter" when I served. It wasn't well liked. Ditto the myriads of soldiers I know who share a disdain for it.
I find it interesting that of all the people I know who are civilian shooters who were in the military in combat MOSs and who use an MSR of some type, none are in 5.56. They are either in .243, 6.5. or 7.62. You can guess why. They don't trust the 5.56 round other than for nuisance animals like coyotes. I've seen coyotes take 5.56 rounds center mass behind either leg and limp off to die in the bush. Never seen or had this happen to me or guys I hunt with using a .243, 6.5, or 7.62. They are DRT. And we don't hunt with FMJ.
If a superior (than issue) round being used on coyotes is suspect on occasion, you can imagine the troops who actually need decent rounds are hungry for something that actually performs as it should. 5.56 has been shown to be weak and ineffective except in a crew-served hail of rounds scenario or extremely close in. 6mm/.30 allows troops to keep the enemy further out there while still taking them down.
Military is working to get off the 5.56... https://www.military.com/kitup/2018/04/11/marines-working-ar...
https://www.armytimes.com/news/your-army/2018/10/05/the-army...