ORIGINAL: pdwads
As best as I can remember you should only fire buck shot from a cylinder bore. a cylinder bore choke does have a slight taper and is designed for shooting buck shot. Firing buck shot from a full choke or anything other than a cylinder bore causes a bouncing effect on the shot as it is exiting the barrel. It tends to spread to fast. Using a cylinder keeps the buck shot together for a longer distance.
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Also slugs are able to be fired from a full choke because they have rifled groves.,and the rifled groves are designed especially for that purpose.
Phil
Buckshot is fine to shoot through a full choke. That's all we ever used for deer was 00 buck and a full choke. I would be really careful about any more restriction than that because your pressure would increase and the shot would be really crowded so patterns wouldn't be very good anyway. As far as slugs, I wouldn't want to use a full choke for slugs. If you are using Foster slugs, Cylinder up to Modified would be the best. Because Foster slugs have a hollow base, they flare out to seal off the barrel. Like Dawei said, they have underbored heads and the grooves only provide slight rotation at best. But if they expand to seal to the barrel, then you would be forcing them to constrict again in the last 3 inches of barrel. That's dramatically increasing the pressure. This is what I was told by the guys at Winchester anyway. Not that is can't be done, but it wasn't recommended.
I'd save the yote hunting until after season. No sense in educating birds.