Cannot say I have seen a ton of grouse nests but some years I would stumble onto one or two. The folks I worked with would find some too. The most eggs I can recall seeing or hearing about in a nest was a dozen and that number seemed to be the most common amount. Never saw less than about eight.I found more grouse while banding this year than last. Thought Jit had found me a WC brood but when I got to him a hen grouse left this nest. She didn't go but a little hop, took a couple pictures and a quick count before leaving. Not sure how many one hen can produce, but there were 20 eggs in this nest. Seemed like a lot to me.