Ok, to do a comparison shoot, I purchased some Winchester 12ga Super-X hulls today. They were labeled as Xpert High Velocity Steel Shot, Game & Target. 2-3/4" 1325fps, 1oz, #6 steel shot.
Using the Lyman 5th edition to help describe these shells, externally they look identical to the bottom listed Winchester Shell on page 34, Polyformed Plastic with Plastic Basewad 2-3/4" shell. However, internally the wad looks like the shell on top of page 31: Polyformed with Plastic Basewad 3".
My phone is dead, and I have no other way to post pictures at the moment. Anyone have any input on these? I know that the three listed shells have interchangeable data per the 5th Edition manual. However, this basewad is clearly unlike those three listed.