I had some Russian made slugs that I shot out of my contender barrel. I don't know of any sabot slugs in 410.
I took the choke out to shoot them and they weren't that accurate. But the sights I have are a big front bead and a rounded notch rear.
The .410 slug isn't terribly powerful and I would just keep a handful of warmly loaded 45 Colt rounds and unscrew the choke. I know that this takes time and if you happen to jump a bunch you don't have a lot of it.
Hope this helps.