For good performance from defense-type cylinder bore shotguns, do yourself a favor and try some of the Federal "Flite control" buckshot and "Truball" slugs. I have switched over all my SD ammo to these designs. The OO buck reduced reciol load will pattern the size of my hand at the back of the 60' range at work and I can easily make head shots with the slug from the defense gun we keep behind the counter. These loads actually do offer some innovation and increased performance over other brands.
Federal Premium - FLITECONTROL
Federal Premium - Slug Details