What makes Wolf ammo stink in AR's etc. is the steel case that does not obdurate as much as brass, and possibly the coating they put on it.
It's a combination of all of the above. Wolf ammunition is filthy. A lot of that can be attributed to the powder they use in it's manufacture. The Lacquer and Polymer coating they coat the cases with are another issue. If fired in a hot chamber these coatings can in fact melt, causing difficult extraction. That, combined with the steel cases they use, are hard on extractors.
Back to the primers. I've seen photographic evidence posted on the Internet over the years of rust and corrosion on AK-47's that happened after shooting Wolf ammunition through them without cleaning afterwards. If this is true, (and while I'm suspect of everything I read and see on the Internet, I do believe it to some extent), it is enough for me to stay away from Wolf products, based on the possible rust and corrosion factor alone.
For someone who still wants the cheap shooting Wolf ammo provides, they could simply do a full corrosive ammo cleaning afterwards and they would be fine. There will come a time when Wolf will be more attractive in price than it is today, then it will change peoples perspective on it. But for example, this Saturday Cabela's here in Arizona is having a "Door Buster Sale" and they have Federal American Eagle AE-223 Tactical ammo, (Black and white box), for only $5.99 a box. That translates to only $299.50 a thousand. That's the cheapest I've seen brand name .223 in a long while.
Primers are still a relatively cheap reloading component. If Wolf primers even have a chance of being mildly corrosive, they're just not worth it. Places like Weider's and Natchez still offer good prices on bulk primer purchases from brand name manufacturers like CCI and the like. As long as they do I'll spend the few extra bucks for the peace of mind of knowing I'm getting good, reliable, non corrosive product. Bill T.