I can't see them in gray, either, so it's not just you 😂. I can hit 1" black dots with it most of the time, but I've never tried 1/2" before. I can just barely see a 1" black dot at 100yds in good light, my eyes aren't as good as they were 10-15 years ago. Not expecting great results, but I figured I'd give it a shot, anyway.

I robbed my Williams 5d off it to put on an air rifle earlier this year, and just replaced it with a Marble's 95 the other day when I took that picture since I couldn't find a lowline Williams in stock.