I didnt get as nearly many super worms as you, I think 200, and out of maybe 60 left over worms, 6 went to pupae, 3 came out as beetles. 2 males, 1 female. They did the nasty a lot, but my colony never got off the ground, no little worms or anything. My last beetle just died a couple of weeks ago, and I started this project like last summer.
Apparently I can't raise insects. :/