Cylinder choke and either the Fosters type slug, the BRI rifled slugs or the tru-ball slugs from federal. NO SABOTS unless you have a fully rifled barrel, which you can pick up in a scoped combo for around $230.00
Big Al's "Take-Em" Style Silhouette Decoys Pro-Staff.
Would a rifled choke with sabots perform better than rifled slugs?
You'll have to shoot your particular combination of gun, choke,load and type of slug to find out if we're talking accuracy. On game probably won't matter too much within your limitations of accuracy and range since most slugs are hammers.