On the changing chokes deal . . . I find myself in between Stan and Ted. (Which means I'm likely to get crushed from both sides!) Several years back, I had Briley put Thin-Walls in a 16ga Poli. I shot 000/005 for grouse and woodcock; 005/015 for prairie grouse and pheasants. Since I typically start the season on the prairie, then hit the woods for grouse and woodcock, and then hunt pheasants . . . I changed twice, for hunting purposes. Had I gone to TX to hunt quail after the pheasant season, I likely would have changed back to the more open chokes.
