I’ve always heard and believed they will spin from a smooth bore. But there are likely as many folks who believe they don’t. What say you?
https://youtu.be/jRPo19DWlZY
https://youtu.be/jRPo19DWlZY
In the northern shotgun only states they use the saboted slugs in rifled barrels and from what I read, they sight them in out to 150 yards. They are a lot more accurate than slugs in a smoothbore.
They have slug gun competitions with some shooting close to 1" groups at 100 yards.