SawTroll
Information Collector
Agreed, regarding Stihl chain!rbtree said:13/64 is better, and switch to 3/16 when the cutter is 1/2 gone or more. Much easier to maintain proper profile with the smaller file.
Oregon though, recommends 7/32 for most of their 3/8" chain - and they are right too! On those it works well to swich to the 13/64 for the last part of the chains "life".