Strange thing happened to me the other day. I decided to cut awhile on the many treetops in my timber from logging last fall, and grabbed the wrong file for my saw which has a H30 .325 pitch chain. Instead of a 3/16, I had got a 7/32. So I decided to touch it up anyway. Could not believe the difference it made on the sharpness! Much better. The chain is better than half gone as well. Anybody had a similar experience?