will steel casings wear out your chamber?

[Gallahad]

see 9mm and 40 s&w by a lot of manufactorers that is cheaper, but don't want to get it if its going to wreck the barrel.

[BUGEYE]

I would be more concerned with the extractors.

[Glock Doctor]

No, steel cartridge cases won't wear out your pistol's chamber.  'Why'?  The steel is much too soft to do that. 

[Gallahad]

never owned a glock before, why should I be concerned about the extractor? maybe I should have posted "anything bad about steel cased ammo?"

[Savage]

I haven't  fired enough steel case ammo in Glocks to know if it damages the extractor. The most I fired through a Glock was a mdl 21 that digested around 3k rds. I have my doubts that the average shooter would shoot enough steel to wear out  or damage anything on a Glock, extractor included. Like Glock Doc said, the steel cases are pretty soft. If it makes you feel better, extractors are inexpensive and can be replaced in a minute or so.
Savage

[His lordship.]

I have been known to use steel cased ammo (Russian) in my pistols.  I found it to be too dirty for my CZs with all their nooks and crannies in the frame, and it was stiff enough to cause occasional jams with my 1911, but every now and then I use it with my Glocks.

I will no longer use Russian steel cased ammo in my AR-15, I had put 80 rounds through it without problems over the year, but the last time one of the .223 cases jammed in the chamber, had to use a hammer and cleaning rod to pound it out, and this happened on a cold gun, so I could not say the shellac melted into the chamber.     Also, the AR rifles get dirty easy, they were designed that way, so the Russian powder really soils the bolt body. 

I have been nervous about the steel thing, but a box here and there should be ok when it is on sale with my guns.