I usually run the appropiate Stihl RSC chisel chain, but needed a chain quick after hours and bought a Oregon chain (L74 22bpx). Didn't notice before or was in a rush that this chain is .063 guage instead of the proper .050g. It rolls good and sparked at the tip a few times when I first put it on. This is a semi-chisel chain and the difference was like night and day to the Stihl. I'm assuming since it was able to fit that I am in need of a new bar. Would it hurt to keep running both chain guages until they need to be replaced? I would rather wait and replace the bar with a .063g.