Yeah typically home defense shotguns are cylinder bore since they offer good spread at close range. Specifically designed home defense loads like your segmenting slug (I'm assuming PDX1) will actually benefit from use of a cylinder bore. Your segmenting slug is not designed for penetration but more for expending its energy as quickly as possible (hopefully before it exits the person). And to do this it has precut segments. Any kind of choke on this particular slug may put stress on the segments and hinder its performance when it reaches for target. So what I'm trying to get at is this:
1. Specifically designed home defense loads work best in cylinder bore barrels
2. Foster and Brenneke slugs work best with improved cylinder chokes
3. Sabot slugs only really work in rifled barrels
4. You can technically fire anything you want out of the cylinder bore barrel, it won't hurt it a bit
I know quite a bit about the ballistic performance of shotshells because a friend of mine likes to test certain loads at the range, and I really find it quite interesting. Hope this is helpful!
Any chance someone can answer my question though? What smoothbore slug guns do you guys see in the field most often?