I don't use the Bulge Buster or Glock Rx, nor do I intend to. Honestly, I think it's just a gimmick.
If the used 40 S&W brass I'm using won't fit into a regular die, I won't use it. So far, I haven't had that happen. Furthermore, I don't run my loads at the upper limit for the caliber either.
Common sense and moderation go a long way.