I've used it on wood ducks and killed every duck I shot at with it out of 16ga L.C. Smith. Of course this was in flooded timber where the shots weren't much over 20 yards.
I have one box left. After thinking about your post, Chris, I think this is how I will use mine up, on woodies in little beaver ponds. I could probably kill every woodie inside 20 yds. with 11/16 oz. of no. 9s, so this sorry Classic Doubles stuff should work alright there. My terrible experience with it has been at longer range on big ducks.
SRH