I'd personally take the bottom of the gullet down a bit, then put a real file on the cutter and retry. Be sure of the angles. Doesn't look too far off...
OR try and square file it. I pretty much never give up... lol. [emoji2957]
To me my time and patience is more valuable than that loop.
It's much less *s-wordty than the TriLink I have (and stopped using!!!), but to me it's still *s-wordty.
Grinding the loop (and a couple others) was a test to see if I can get decent sharpening results in lesser time than filing - it was a negative, filing is king.
That Archer loop did get round filed since 2017, and it will buck OK - but it stops dead in knotty oak, noodles poorly, doesn't feed well when fully burried.
These are all scenarios that I encounter and in addition to bucking I want my chains to perform no less than average under any of the given circumstances.
Come to think of it, I should have used this Archer loop on the small diameter ash and beech logs that I have dismantled recently - would have taken at least some of it's remaining life away.
I don't square file, and even if I were to I certainly wouldn't do it on an Archer loop considering my experience with it.
As I keep saying, if Archer works for You - I am glad and happy for You.
Without affordable competition brand name chainsaw chains would be more expensive then they already are!