I'm currently filing on a couple 20" loops for tomorrow, and for some reason my 20" loop of RM dosn't fit the bar guide well. Almost like the bar is too tight or slightly and evenly pinched. Wierd. The Oregon loops fit fine, and the RM fit's the 455 Bar fine.
Might just be needing some more break in.
Thanks guys!!!
Dingeryote
Check the guage of the chains and the bar. They need to be the same. The Husky bar should be either a .050 or a .058. The Stihl chain is either a .050 or a .063. If they both are the same, (.050) then check the drive links on the RM loop for damage. You can file or grind off burrs if you find them. If the loop is excessively worn then don't run it on your new bar.