I didn't think about that, your likely correct.I would suggest you reconsider the 3/8LP chain. That saw is only 30cc displacement and a larger chain size would likely give you problems with chain stoppage and could damage your clutch. My Stihl 018 is real close to the same size as the cs310. I run 3/8LP on it and that little saw screams through stuff up to 12" diameter just fine! If you go to a larger size chain I would bet you will not be happy with the result. I am not sure, but a larger chain with wider kerf may not clear your clutch cover either. If you do change to a larger size, let us know how it works....may be good info for others who are in your same situation!