I estimate 30 ppg for Grouse's pale millet, 25 ppg for CMC red proso pale malt millet. That tends to line up with my results if I estimate a 75% efficiency on my homebrew setup. Higher roasts will have lower extract yields, I tend to estimate dark-roasted grains (200°L or higher) at no more than 15-20 ppg. YMMV, but I haven't been off by more than 1 or 2 points in my last 7 or 8 batches.
