Just an FYI to any reloaders out there. Seems S&B (Sellier & Bellot) has a run of brass-washed steel case 9mm Luger out there in the "wild". You can't tell it from regular full brass casings without a magnet. The headstamps I have seen and sorted out are S&B 9x19 Luger 08 (or 09) codes. All have the red primer sealant.
If you pick up range brass I highly recommend you run a strong magnet over your brass gleanings to pull out any steel casings. While I have heard that you can reload steelcase, I believe there can be issues with the crimp, which may increase the risk of bullet setback. That could result in a serious negative-happy experience at the range! It's not worth the risk to me, so into the steel recycling bucket they all go!