If you have 9mm steel core, sell it. It's impossible to find, and illegal to make. pretty valuable stuff. I don't see why you couldn't shoot it. Just don't do it at an indoor pistol range.
I have shot steel cased 9, 40, and 45 for years. I havn't had any issues what so ever. No extractors breaking, no jams, nothing. But all the steel case ammo I shoot has the poly coated case. The guy on the Military Arms Channel shoots it all the time with no problem! If its good enough for him, its good enough for me!
I don't use it in handguns - but only because we reload and steel is a bear to reload - and I have heard destroys dies, plus almost all is berdan primed. I have used a lot of it in rifles when the ammo is available cheaper than the cost of reloading. I would shoot it without any worry. The only problems I could foresee is that it may not cycle or eject as well. If your chamber is "tight" and it does stick - sell it - but don't expect to get high prices.
I think its more of a personal preference. I shoot soem steel cased stuff and never had a problem with it, but ow i reload so its always brass. Also has to do withe the gun. Ive shot shot steel cased out of my taurus 92 and glock19, no issues. But when i tried to use steel cased in my jericho 941 .45, it would not cycle correctly.
There is a LOT of misinformation, rumors and internet gossip about steel cased ammo.
Here 2 sources that state the facts of steel cased ammo. These talk about Wolf ammo because it is the most popular steel cased ammo out there. But this applies to all manufactures.
I placed an order a while back for some Russian steel cased ammo in both .45 and .357. I couldn't believe the price! No regrets. I have shot at least 50 rounds of each and have had no problems!
I fired one box of Tulammo (zinc coated steel) in two pistols on one range trip, and both guns (m&p9 and PX4) failed to lock the slide back on empty. This had never happened before. So I switched to brass, and the problem persisted. I can only assume the Tulammo messed up those magazines somehow. The other mags are fine.
I refuse to shoot any more steel, it just isn't worth the risk of hardware failure IMO.
My thoughts are: I would rather use factory new ammo than some production reloads that I pick up at a gun show. For the price, I never experienced a problem and I don't worry about collecting my used brass either.
I checked the latest prices. Out of stock for all of the cheap stuff. What they did have was considerably more than I paid in the past. So...probably another bargain dried up by the threats of new laws.