For the 20th time this year:
I have shot close to 16,000 rounds of polymer Wolf .223 in 7 different AR's, from a cheapo Del-Ton build to a Colt SP1 to a 11.5" RRA SBR.
I have only experienced 3 problems total. 1 case stuck in a very dirty chamber (around 750 rounds through the gun), one primer that came out and lodged in the disconnector, and 1 failure to extract that resulted in a stuck carrier. All were easily remedied at the range.
I have not broken any extractors, as a matter of fact all show only normal wear. All of my guns shoot it well, it goes bang. It's not accurate, it's kind of dirty, but it's cheap and reliable practice ammo....which is all I use it for.
Over the course of those 16k rounds, I have saved nearly $1500 in ammo prices, giving me the money to replace 2 of my rifles entirely, or enough spare change to buy several hundred extractors.
If you have an AR that will not shoot Wolf .223, there is something not right with your gun, period. A correctly operating AR with a .mil chamber should eat it like candy. If that weren't the case, I wouldn't have 16k through a whole collection of AR's without some more bad stories to tell.