Are BBs or Pellets more accurate?

In general, BB guns are smoothbore, and the barrel is larger than the steel BB. Pellets guns are rifled, and fire a lead pellet that is a squeeze fit to the bore. This is MUCH more accurate than a BB. GOOD pellet guns are more accurate than firearms, within their usable range. I have one pellet rifle that will put pellet after pellet into the same hole in the target at 10 meters.