That is almost impossible to even have a WAG. Is the shocking before the stocking of shad and BG ?

I would hope they can get , over a reasonable time, 300 LMB not counting fry.

Who is doing the shocking? Tell them exactly what you are after and why. If they see a LMB nest occupied or not shock it to kill as many fry as you can. Get them to keep shocking as long as possible. Even shock open water (no cover) as well.