What 3" hulls do you have ?
No just a few 3" hulls are worth loading
Cheddite ( Kent steel shot hull )
Rem type VI ( steel shot hull)
Activ
Fed plastic base wad 3 " ( steel shot hull)
Wads are steel shot wads , I use Sam 1
I load RSI loads
http://www.bucksrunsports.com/
They list wads , hulls , load books and hevi shot ( have to call in order)
Alliant lists some loads
http://http://recipes.alliantpowder.com/rg.taf?_function=non_toxic_shotgun&step=1& _function2=setJavascriptFlag&gauge=12&gunt ypeID=&shot_type_ID=2
Follow recipes exactly !!
Weigh out all powder charges
Johnch