Just a quick point... cut one of those Winchester Super X shells open and look at the pellets. Do not listen to me, just look at the pellets.
If you do not see the point go buy any other brand/box of shells and do the same thing. The pellets will be anything except round and the patterns will be horrible!!!!!!!!
Rick Bin, a better than ordinary wing shooter, could not figure out why AK sea ducks were bullet-proof... then we cut open a shell and looked...