I use tulammo in my FS 40 no problem. (ONLY when I can't get anything else) prefer brass to steel. My buddy has a 40c and it fires, ejects, but FTF every round, a mag tap fixes it.
To further add, I used Federal Guard Dog as my defensive carry round, almost all cases bent behind where the bullet seated in the case. Federal replaced it, did the same thing again in different mags, switched to Hornady critical defense and no problem.
Well, I took those federals to the range to burn up and every one of them ran through the FS perfectly, go figure! I just didn't like the way they looked with the dent in the case.