Dave,
Ole buddy, never mind you wont hit woodcock with any of them on somedays.
They can be tuff buggers to hit, but I love them, there will be other days when they fall when you thought you missed for sure. My current favorite for grouse and woodcock is a cut barreled 20ga it's 26 3/4" .010 /.005 I have returned to the truck with 1 loaded shell and a bunch of hulls alone in the game bag and other days let 3 right barrels loose and was done with them for that day.
Seems like the days I keep missing them the gun unloads itself before I get it to my shoulder let alone get my head on it.
Maybe try spreaders on paper first. Let the hack saw hang on its peg, there are open choked grouse/cock guns out there because for a number of grouse hunters the next one is the best one.