My AR15 is a Bushmaster 20" barrel (1:9 twist, if you care).
Wolf will generally run, but there will be a stuck case from time to time. I think at one point I went about 200 rounds without a problem. Usually a case of Wolf gets stuck every 40-60 rounds.
Wolf Ammo sounds different, and the recoil is lighter. I've read where people have chrono'd the stuff and report that it is much slower ~2600 fps. I see no problem in that for training short range, or shooting an AQT. It will keep 3" groups at 100 yards for me.
Brown Bear / Silver Bear / Monarch ammo is much better - holding under 2.5" groups for me at 100. Sometimes under 2". Since in my area, it is the cheapest stuff going (under $5 per box of 20), this is what I use most. I think I've only ever had one case of Monarch stuck, and that is in well over 2000 rounds shot. I've had more brass get stuck than steel-cased Monarch.
If it were all about accuracy and reliability, I'd shoot nothing other than Privi 75-gr match ammo. That stuff stays under 1" for me at 100 yards, and has never malfunctioned. Problem is, it is over twice as expensive as the Monarch.
For those saying that the problem is in the rifle if the steel cased stuff doesn't feed - you are right. My rifle has too tight of tolerances for Wolf. But then, it will print sub-MOA groups at 100 yards with match ammo.
Also, the steel used in steel cases is softer than brass - hence the pictures of torn rims. This cannot possibly be "harder" on extractors or any other parts than brass counterparts.
Many of those whining about malfunctions with steel are doing just that. They want their gun to run 100% flawlessly (which no gun does). Get real. This is life. Life is not 100% perfect. Carry a cleaning rod with you, and other basic tools to the range. Enjoy the fact that you can shoot twice as much for the same price.