It depends on which line or lines you have, some lines will have more culls than others. One of my lines I culled around 90 to 95% last year, but I probably culled heavier than most people probably would have. But so far this year, I'm not having to cull as hard at hatch as I was this time last year.
Mine are directly from Old Orchard Farm. I was extremely happy with my hatch rate (7 out of 8). Greg and Lauren are fabulous. Just not sure about how good of a cull rate I had lol.