Switched bars on my ms310. Went from a 20" 3/8 bar/chain to a 16" .325 combo. The saw now cuts much faster. There was a time that I though about getting rid of the saw because I have a Dolmar 5100 and ms310 was not getting any saw time. The 20" 3/8 bar makes it look tough but the 16" bar cuts better IMO. Now I run both saws a tank of gas each then sharpen. Both saw have the cheap chain/bar combo on from Bailie"s. They seem fine for right now. I have @ 6 cords to buck so they will work for now.