Well, I had a go at the big teal at Wylye today. I didn't start at 100 yards because we didn't know where the marker was. Me, Andy and Hazel shot it from approximately 85 yards.
It seemed appropriate, as per this thread, to approach this issue with a technical brain and oodles of ballistics mathematics, so with this in mind, I put the shells in my baby, threw her to my shoulder, and calmly called "Puulll".
I lost count of hits after 5, and Andy and Hazel hit a couple too.
I retired today as big teal champion.