I read Dig's comment about them on another site. He is smitten with them.
I went to the site and discovered that they produce both 2 1/2 inch and 3 inch shells. You may have either #6s or #71/2 shot.
When considering that they are a gross pain to reload, the store bought may be worth the tiny savings over reloads.
With the Polywad shells costing (including the $12 shipping) near twice what the "normal" brands does, I would not buy them for clays. They may be well worth considering for birds.
If the patterns are as tight as touted, they should be great early bird killers in #71/2 shot. The #6s may do well on later season or wild birds. This is predicated on the skill of the shooter. An accomplished shot may be able to cleanly kill at a somewhat greater than 25 yard distance.
Best,
John
