But then there is the issue about the ammo itself. Steel cased East Block ammo is cheap, and runs hot. Wolf isn’t so bad, but it will wear the bore out of your AR variant very quickly (around 5,000 rounds), giving the projectile a keyhole type entrance wound and crappy accuracy.
We always thought that the captured AKs we trained with were just sloppily manufactured with all of the stamped parts - no - it was the worn out chambers from their ammo.
There was a long article posted about the steel cased ammo in here a few months ago - I stopped using it in my AR shortly after that. Keep it on hand for emergency use only.
Short of .338, 7.62x51 is still the best all around cartridge for me. Yeah, heavy. Lots of penetration through cover objects (like both doors of a car) and still quite lethal. I’m done humping SAWs or heavier MGs, and prefer stand off capability using quality glass - too old to clear buildings. Shooting thru them is easier…
I only use Federal Eagle brass rounds in my Mini-30. The Steel/resin crap ruins the works.