I happen to like bead and mid beads - I have shot a LOT of rds with this set up in competition. Slugs are just one more payload to me...
I shoot this set-up the fastest and best. My accuracy mirrors those of Bob Freddy's above. My guns tend to like The Win or Fed slugs best.
Get a 5 pk of various brands, shoot for groups , select the best for YOUR gun. Run back to store and buy plenty of the same lot number.