Er... there's actually an exception to this. It's called a "split" shell. If I post info here, admins will just yank it. I'll e-mail it to you though. :-)
we discussed the 'split' shell before, still sounds 'iffy' for defense loadings unless you got reeeeaaaaly good at it...
and no way would i post it here, as i believe you are correct in that the post would be short lived...
#4 is prolly as heavy as i'd go anyways, with the way the house is laid out...beyond that, Im fightin towards a rifle and LOTS more renovating of the ole farmhouse...8^}