3/8 picco stihl chain and oregon 500a grinder

[KodiakKen]

can anyone shed some light on this dilemma. In the little brochure that comes with every stihl chain it gives the sharpening angles. I have used this with great success on everything except my ms200. The book calls for filing angle of 30 degrees..like all stihl chains and side plate of 85 degrees. I have tried about everything and can't get it right..bought a brand new chain and tried to duplicate that angle...I guess I will just take these in..any trick to this..thanks in advance

 

[retired redneck]

30--50--90-- i do all junk pico chains at this angle no complaints yet......