Is it the bar or the chain?

[Man'N'Maul]

Hey everyone.

I've acquired an ms260 with a couple spare chains. Progressing through the first chain without any notable concern , I've gone to an brand I can't identify by markings.

Tangs match and I've dressed the bar (, to what I believe) to be squared with the dressing tool.

I've given a good once over of the chain for file and rakers with the depth gauge.

the problem I'm facing is through a cut of greater then 5-6inches it seems the cut wants to slice / curve out too one side.

Could the bar be twisted, not squared, chain filed incorrectly

 

[cookies]

if the bar's groove where the chain rides is worn the saw will cut in cursive, replace the bar AND chain