It's not about the shells, or your gun, or the chokes, or the patters at 30 yards. You are over thinking the gear thing. This isn't about gear, and it isn't rocket science. You observed the perfect opportunity, stopped your swing, and shot behind them. Shoot where they are going to be, not where they were. Shoot them in the head. Enjoy your duck dinners, next time.
Yeah ... I'm going to try an IC and #4's.
I probably missed cause I've switched to shooting righty due to eye dominance although I'm left handed.
Most people miss because they aim, stop swinging, and fire.... Like previous posts say "swing through the bird" and pull on them. Lots of hunters complain about wounding birds with steel shot, normally caused because they are slightly behind the bird "gut shooting" them and because steel shot does not deform like lead on impact and also because of higher velocities it tends to sail right through the bird and they end up bleeding out a couple hundred yards away.... Another tip is try to use consistent fps ammo regardless of length or shot size. Bigger and more $$ ammo doesn't always mean better results, remember exspensive ammo is like exspensive golf clubs - they don't come with a swing!!
I also do better when I'm surprised and don't have time to think about it.

Also, I have some Win xpert 1 1/4 oz loads BB 3'' at 1440 FPS, will the extra pellet count be worth it over the decrease in velocity of 100 FPS from 1 1/8 oz?
On a somewhat similar note, I use Prairie Storm for upland birds and I'm very happy with them too.I find that black cloud works the best for me



























