If you search around there’s been a bunch of buckshot tests done that say #1 is the best overall. The gelatin tests are pretty convincing. Ufortunately loaded #1 is darn near impossible to find nowadays. #4 is out there and if you live in a neighborhood like mine it’s probably a good choice.
Interesting. Not being much of a shotgunner, I don't know a whole lot about them. Looks like a case of a bunch of folks falling for the old "bigger is better" meme.