If you shoot sabots out of a smoothbore barrel the accuracy will be poorer because of the lack of spin that Levi pointed out. I have only tested them to about 15m (bear defence range for me) and the accuracy with a couple of different types was the same as the standard Foster slugs.
There will be a distance where accuracy will suffer a lot, I just haven't had a chance to test it out yet.....for several months now. Soon to be remedied I hope.
Cheers