Can't comment on which one to pick, but the only time I have ever used the bbl selector is gunning waterfowl. With upland, even with a bbl selector on my wthby, it's just plain faster to shoot thru the I/C bbl to get to the Full tube.

And if the bird is unlucky enough to run into a 7 1/2 pellet from the first shot, my Small Munsterlander Pointer never lets a hit pat/timberdoodle/pheasant get away.....

Gary