People dis the AR10s for being heavy. Well, yeah, they're 8 and something pounds.
It ain't like I'd be packin' one in rough country to shoot across canyons and if I did, the .223 would NOT be an alternative. The AR10 really isn't my cup of tea, no AR is, but I could see it as being highly effective in a stand, maybe night hunting hogs with a night vision scope (which might weigh as much as the rifle). You could lay 'em out with that sort of firepower in .308!
And, weight really doesn't matter in a stand.
The AR10 has been around for a long time, yet people STILL insist on trying to hunt bigger game, even hogs, with the .223 ARs. Sure, a head shot would be effective if you can get a head shot, and hogs are taken at inside 100 yards especially at night, but still, the AR10 is the better bet IMHO. Folks don't think too much of hogs, though. Me, I love the meat, but lots of people just shoot 'em and let God sort 'em out. Yeah, they're a nuisance animal, but I'd rather kill 'em dead and collect the meat.
I'm funny that way, more into the meat than the killin', is a reason I like trapping 'em as opposed to sitting out all night trying to stay awake.
And, well, quality night vision is expensive on a fixed income.
Anyway, were I wanting to hunt with ANY ARs, I would skip right past the .223 and the .300 BLK and the beowolves and grendels and other such oddball weak sister substitutes and move right on up to .308 (or 7.62x51 for you ninjas out there) and live happy.
My current go to deer/hog centerfire is a .308...a Remington stainless M7, so I already handload the caliber. But, I'm really not into ARs. I shoot lefty and wouldn't much like the ergos, anyway, in the field. Too much crap sticking out of the bottom of those things to comfortably carry unless you wanna look like a ninja with one of those military 2 point slings or whatever they are. My little M7 shoots 3/4 MOA, so it's plenty adequate for MY hunting needs. BUT, if I WERE into night hunting hogs, I'd need a rifle with a rail as most night vision won't fit a standard Weaver mount, need a rail. I think a M1A would suit my personality and desires better, though, or a Mini .30 in 7.62x39, OR, maybe I could find an aftermarket rail for my SKS. They make all sorts of stuff for SKSs, but I haven't looked at the aftermarket in 20 years.