For quail, I like #7.5 shot, 1oz loads in 20ga. For whatever reason, 1oz loads are harder to find, but I much prefer them. As for Chokes, IC & Modified paired together if I'm shooting an over-under. If I'm shooting a semi-auto, I almost always run an IC for most everything. I'll go to a modified if I'm hunting spooky pheasants that like to bust way out in front of the dog.