Okay, it fires the brass with no problem and the only ammo you seem to have a problem with is the Wolf steel case.
I would just stay away from steel cased ammo. The firearm seems to be working okay, so I would not try to fix it.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
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Former President of the ECPT (Eifel Combat Pistol Team)