Winchester 16's....
Funny, but all the years the old, smooth, 8 pt AA type hull was being factory loaded, and you could buy the WWAA16 wad to reload them, I rarely saw the wad used in factory loads. The 3 on the left are from the early 1990's and the heads are brass. The first 2 are the AA hull loaded with 1 ounce for squirrels and 1 1/8 ounce for pheasants. The high brass one, though a 6pt, seems to be made of the same slick plastic.
When the AA-type first disappeared, it was replaced with hulls having zinc-plated steel heads and thin, flimsy plastic but still with the old Mark V carboard and plastic wrapper technology. I have to say I really disliked those old confetti factories.
Strangely, it wasn't until after the blue wad disappeared as a reloading component that I first witnessed it in factory promo ammo. It's almost as though they stopped making them and, rather than sell them to reloaders, shipped their remaining inventory to Italy where they were loaded with a ball powder (very Winchester in appearance). The Italian flavor was very short-lived and superceded by the Australian flavor with a Gualandi wad and flake powder (very Hodgdon in appearance). Though brass-colored, those case heads are steel.
IMO, the current factory load is the best 1 ouncer Winchester ever produced and the hulls are as reloadable as anything out there, meaning they're good for 3-4 times before I toss them.
