The only problem I have ever encountered with the steel cased ammunition is when it is fired the steel case does not form to the chamber as easily as brass, so there is more carbon in the chamber, this can cause extraction failures if you let it get too dirty. I have fired a few hundred rounds in a single session witout an issue.
It may be steel cased but it is much softer than any of the parts in a firearm, including extractors, you will have to fire one heck of alot of steel cased ammo to wear out an extractor.
NRA Lifetime Member Since 1999
"I ask, sir, what is the militia? It is the whole people except for a few public officials." George Mason