Know most of this but always great to see again.
i have the same shotgun, he needs to try it with remington 3" magnum 15 pellet 00 buck.
My informal, unscientific testing led me to believe that #6 or #7 1/2 shot would be fine for home defense. I don't have a shotgun, as I use my M4 and G19 for defense, but I will have to try some more testing when I buy my scattergun. Good article.
Have any of you fellas ever used Centurion Buck and Ball? It's loaded with a combination of 1 65 cal round ball and 6 #1 Buckshot.