Lots of information posted Dave.

It's more fun to kill 3 on the raise than 2 IMO.

I've owned alot of different shotguns from Perazzi's to Brownings/Remingtons. 20ga Semi is my recomendation for your task (benelli is a solid choice). My favorite was a 1100 28ga (not for geese but everything else including ducks over dekes) I'd buy half a pallet of shells a year for that gun until steel came into play. Went bacl to 20ga for upland and 12ga for ducks & geese.

Killed alot of bird over the years. A bird doesn't know if it's shot with a 28ga or a 12ga. Speed kills though, and pattern density is crucial depending on your anticapated bird as well as distance.

There's more pellets in 1oz of #8's than 1 1/8oz of #7.5's. WOW...I thought I left 20yrs of trapshooting behind me.