We have a 20" bar on the Husqvarna 460 saw and it plugs up with wood chips enough to stop the chain.we have been cutting wood since 1973 and never had this problem with the Stihl or Homelite saws we have used in the past we really like the overall performance of the saw but cannot use the saw with this problem. My dealer says Husquvarna hasn't had a problem like this. We tried this saw with a 18" bar and it works good. I think the difference is in the width of the bar as there is maybe not enough room for the chips to go on out and therefore plugs the bar. The dealer offered a solid bar but we wear out the chains and bar to soon with the solid bar.