My thoughts on buckshot.

#4 has always been my preferred choice but it's  always been harder to find than 00.

Terry

Yep, you won't find it on the shelves. I just looked at targetsports and the only #4buck they have in stock is 3 1/2".
Talk about sticker shock, some of those bismuth shot shells are up to almost $13/ a round!  I haven't hunted ducks in the modern era, back then lead was the only thing there was.