I patterned some Hornady Critical Defense 12ga 2 3/4". It's 8 pellets in a "versatite" wad (I suspect it's a Fed Flite-Control renamed). velocity is 1600 fps.
I'm shooting a Rem 870 18.5" Cylinder bore
This stuff patterned'
10 yds - 3"
20 yds - 7"
I was impressed, as 1 inch per yard seems typical in my experience.
Didn't get a pic of the 20 yd target, but this was 10 yards,
A gratuitous pic of my shotgun, with new Magpul stock and forend.