I had a similar event with my Legion. 130pf reloads, I fired a round that felt very light, hardly any recoil, and sounded like a case with hardly any powder, but not quite a squib. I stopped myself, ULSC, and went to the safe area to check the bore. No bullet, but I noticed the extractor was missing from the slide. Went back on the range, found the mangled case and the extractor on the floor. Case had blown out at the web, blew out the extractor, but still ejected the empty. I forget the headstamp.