Buck can be shot from any choke., Often the best results come from the more open constrictions. Until you test a particular load in YOUR shotgun, you won't know.
Slugs oft work best with little or no choke, but exceptions abound. Again, you must test for best results.
Since you're new, I recommend the 101 threads in the Archives. These contain lots of info on shotguns and shotgunning.
HTH...