When I used to hunt ducks, we would get rained on by shot from guys from across the ponds, about 200 yds. It was annoying more than anything else, but I suppose if I had looked up at that instant it might have hurt a bit. Probably not seriously.
When I used to hunt geese on frozen lakes, we would get rained on by shot from across the ponds, too, but the larger shot hurt a bit when it hit you. No blood drawn, just stinging.