I don't have problems with steel cased ammo like Wolf, silver bear and brown bear. I do have a problem with the Tulammo.
In my experience, it smells something awful. It's bad enough that after every magazine, I have to leave the range to get air. This indoor range has good ventilation BTW.
It's power levels are inconsistent as well as the accuracy. When I've shot the Tulammo, I've had to check my barrel multiple times since the recoil feels so dull so I'm constantly wondering if I have a squib.
Accuracy is poor and it leaves the gun looking like a sewage drain hole afterwards. In my neck of the woods, the stuff only cost about $1 - $1.50 less then the brass ammo so to me, it's not even worth it. I've shot the 9mm and 45acp examples with the 45acp being worse. If you can find it cheap, I'd say it would be good for someone with a class 3 FA firearm but I wouldn't test the accuracy of a gun with it.