Hello!
I'm attaching steel track floor channels with nail plugs in my concrete floor (for a steel stud interior wall). I have no problems drilling into the concrete with the drill, but it takes forever to get through the steel track. I would gladly accept tips on how to get through the steel track smoothly. Currently, I tap a bit with a center punch, drill a bit with a dull drill bit, tap a bit with the center punch, and drill a bit. The steel track, which is about 0.1 mm thin, takes 5 minutes to get through, and then it's like drilling through butter when I reach the hard concrete...
I agree with the previous speaker - I go straight through with the hammer drill, no problems there. Then I recommend SPIX expander nails instead of nail plugs as the head is larger and contributes to a stronger installation when working with steel frames against concrete.
If it doesn't work by just pressing with the concrete drill, you can try using a multi-material drill until you get through the sheet, then switch machines.