Well ive been getting alot of wood from a tree service company 30 to 48 inch in diameter and sometimes bigger. And i will be getting alot more of this wood from now on. i have a 361 with a 20 inch bar and its doing ok but definatly dogging on power. what id like to know is whats the biggest size bar you can put on there without loosing power. i would like to go with a 30 inch bar. and ive been cutting alot lately and im putting alot of abuse on the saw as well. i have a 250 and i cant even use it at all to give the saw a brake because the woods way to big.